/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 15:48:54,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 15:48:54,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 15:48:54,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 15:48:54,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 15:48:54,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 15:48:54,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 15:48:54,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 15:48:54,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 15:48:54,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 15:48:54,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 15:48:54,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 15:48:54,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 15:48:54,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 15:48:54,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 15:48:54,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 15:48:54,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 15:48:54,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 15:48:54,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 15:48:54,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 15:48:54,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 15:48:54,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 15:48:54,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 15:48:54,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 15:48:54,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 15:48:54,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 15:48:54,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 15:48:54,817 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 15:48:54,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 15:48:54,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 15:48:54,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 15:48:54,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 15:48:54,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 15:48:54,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:48:54,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 15:48:54,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 15:48:55,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 15:48:55,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 15:48:55,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 15:48:55,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 15:48:55,066 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 15:48:55,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-05-21 15:48:55,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f611ea6/b5981a7d6abf49b38624f8af9374dc86/FLAGdc75e8f1e [2021-05-21 15:48:55,511 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 15:48:55,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-05-21 15:48:55,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f611ea6/b5981a7d6abf49b38624f8af9374dc86/FLAGdc75e8f1e [2021-05-21 15:48:55,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f611ea6/b5981a7d6abf49b38624f8af9374dc86 [2021-05-21 15:48:55,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 15:48:55,533 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 15:48:55,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 15:48:55,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 15:48:55,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 15:48:55,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435584e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55, skipping insertion in model container [2021-05-21 15:48:55,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 15:48:55,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 15:48:55,842 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2021-05-21 15:48:55,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:48:55,852 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 15:48:55,887 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2021-05-21 15:48:55,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:48:55,941 INFO L208 MainTranslator]: Completed translation [2021-05-21 15:48:55,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55 WrapperNode [2021-05-21 15:48:55,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 15:48:55,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 15:48:55,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 15:48:55,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 15:48:55,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 15:48:55,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 15:48:55,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 15:48:55,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 15:48:55,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:55,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:56,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:56,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:56,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... [2021-05-21 15:48:56,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 15:48:56,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 15:48:56,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 15:48:56,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 15:48:56,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:48:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 15:48:56,061 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 15:48:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 15:48:56,061 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 15:48:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 15:48:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 15:48:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 15:48:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 15:48:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 15:48:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 15:48:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 15:48:56,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 15:48:56,064 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 15:48:56,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 15:48:56,338 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 15:48:56,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:48:56 BoogieIcfgContainer [2021-05-21 15:48:56,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 15:48:56,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 15:48:56,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 15:48:56,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 15:48:56,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 03:48:55" (1/3) ... [2021-05-21 15:48:56,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657240f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:48:56, skipping insertion in model container [2021-05-21 15:48:56,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:48:55" (2/3) ... [2021-05-21 15:48:56,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@657240f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:48:56, skipping insertion in model container [2021-05-21 15:48:56,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:48:56" (3/3) ... [2021-05-21 15:48:56,344 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-05-21 15:48:56,347 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 15:48:56,348 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 15:48:56,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 15:48:56,348 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 15:48:56,366 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,366 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,368 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,377 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,377 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,386 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:48:56,389 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 15:48:56,402 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 15:48:56,414 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 15:48:56,414 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 15:48:56,414 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 15:48:56,414 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 15:48:56,414 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 15:48:56,414 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 15:48:56,414 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 15:48:56,414 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 15:48:56,421 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 15:48:56,482 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 15:48:56,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:56,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:56,498 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-05-21 15:48:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:56,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735389141] [2021-05-21 15:48:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:56,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:56,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735389141] [2021-05-21 15:48:56,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735389141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:48:56,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:48:56,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:48:56,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850732864] [2021-05-21 15:48:56,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:48:56,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:48:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:48:56,815 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:56,982 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-05-21 15:48:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 15:48:56,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 15:48:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:56,997 INFO L225 Difference]: With dead ends: 3294 [2021-05-21 15:48:56,998 INFO L226 Difference]: Without dead ends: 1248 [2021-05-21 15:48:56,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:48:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-21 15:48:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-05-21 15:48:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-05-21 15:48:57,081 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-05-21 15:48:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:57,081 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-05-21 15:48:57,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-05-21 15:48:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 15:48:57,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:57,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:57,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 15:48:57,084 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-05-21 15:48:57,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:57,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82240371] [2021-05-21 15:48:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:57,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:57,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82240371] [2021-05-21 15:48:57,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82240371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:48:57,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:48:57,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:48:57,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775915648] [2021-05-21 15:48:57,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:48:57,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:48:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:48:57,172 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:57,278 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-05-21 15:48:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 15:48:57,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 15:48:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:57,282 INFO L225 Difference]: With dead ends: 1302 [2021-05-21 15:48:57,282 INFO L226 Difference]: Without dead ends: 920 [2021-05-21 15:48:57,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:48:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-21 15:48:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-05-21 15:48:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-05-21 15:48:57,332 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-05-21 15:48:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:57,332 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-05-21 15:48:57,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-05-21 15:48:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:48:57,334 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:57,334 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:57,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 15:48:57,334 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-05-21 15:48:57,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:57,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413419330] [2021-05-21 15:48:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:57,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413419330] [2021-05-21 15:48:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413419330] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:48:57,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:48:57,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:48:57,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28410629] [2021-05-21 15:48:57,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:48:57,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:48:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:48:57,449 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:57,633 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-05-21 15:48:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 15:48:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:48:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:57,637 INFO L225 Difference]: With dead ends: 1304 [2021-05-21 15:48:57,637 INFO L226 Difference]: Without dead ends: 1044 [2021-05-21 15:48:57,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:48:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-05-21 15:48:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-05-21 15:48:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-05-21 15:48:57,654 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-05-21 15:48:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:57,654 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-05-21 15:48:57,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-05-21 15:48:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:48:57,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:57,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:57,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 15:48:57,656 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:57,656 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-05-21 15:48:57,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:57,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446311420] [2021-05-21 15:48:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:57,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:57,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446311420] [2021-05-21 15:48:57,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446311420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:48:57,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:48:57,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:48:57,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110849466] [2021-05-21 15:48:57,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:48:57,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:48:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:48:57,755 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:57,883 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-05-21 15:48:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:48:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:48:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:57,892 INFO L225 Difference]: With dead ends: 1772 [2021-05-21 15:48:57,892 INFO L226 Difference]: Without dead ends: 1505 [2021-05-21 15:48:57,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:48:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-05-21 15:48:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-05-21 15:48:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-05-21 15:48:57,916 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-05-21 15:48:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:57,918 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-05-21 15:48:57,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-05-21 15:48:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:48:57,919 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:57,919 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:57,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 15:48:57,919 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-05-21 15:48:57,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:57,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493498778] [2021-05-21 15:48:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:58,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:58,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493498778] [2021-05-21 15:48:58,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493498778] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:48:58,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:48:58,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:48:58,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299498972] [2021-05-21 15:48:58,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:48:58,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:58,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:48:58,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:48:58,011 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:58,100 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-05-21 15:48:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:48:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:48:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:58,107 INFO L225 Difference]: With dead ends: 2211 [2021-05-21 15:48:58,107 INFO L226 Difference]: Without dead ends: 1944 [2021-05-21 15:48:58,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:48:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-05-21 15:48:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-05-21 15:48:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-05-21 15:48:58,132 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-05-21 15:48:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:58,133 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-05-21 15:48:58,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-05-21 15:48:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:48:58,134 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:58,134 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:58,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 15:48:58,134 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-05-21 15:48:58,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:58,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236914385] [2021-05-21 15:48:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:58,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:58,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236914385] [2021-05-21 15:48:58,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236914385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:48:58,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:48:58,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:48:58,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291346283] [2021-05-21 15:48:58,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:48:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:48:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:48:58,183 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:58,321 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-05-21 15:48:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 15:48:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:48:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:58,327 INFO L225 Difference]: With dead ends: 1671 [2021-05-21 15:48:58,327 INFO L226 Difference]: Without dead ends: 1173 [2021-05-21 15:48:58,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:48:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-05-21 15:48:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-05-21 15:48:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-05-21 15:48:58,345 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-05-21 15:48:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:58,345 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-05-21 15:48:58,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-05-21 15:48:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:48:58,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:58,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:58,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 15:48:58,346 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-05-21 15:48:58,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:58,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005179320] [2021-05-21 15:48:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:58,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:58,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005179320] [2021-05-21 15:48:58,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005179320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:58,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33646183] [2021-05-21 15:48:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:58,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:48:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:58,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33646183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:58,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:58,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:48:58,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269006284] [2021-05-21 15:48:58,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:48:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:48:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:48:58,719 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:58,833 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-05-21 15:48:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 15:48:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:48:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:58,839 INFO L225 Difference]: With dead ends: 1526 [2021-05-21 15:48:58,839 INFO L226 Difference]: Without dead ends: 1256 [2021-05-21 15:48:58,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:48:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-05-21 15:48:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-05-21 15:48:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-05-21 15:48:58,866 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-05-21 15:48:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:58,867 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-05-21 15:48:58,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-05-21 15:48:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:48:58,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:58,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:59,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-21 15:48:59,085 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-05-21 15:48:59,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:59,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710174167] [2021-05-21 15:48:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:59,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710174167] [2021-05-21 15:48:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710174167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819501623] [2021-05-21 15:48:59,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:59,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:59,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:59,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:48:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819501623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:59,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:59,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 15:48:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804221689] [2021-05-21 15:48:59,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 15:48:59,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 15:48:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:48:59,322 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:59,423 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-05-21 15:48:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:48:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:48:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:59,430 INFO L225 Difference]: With dead ends: 2408 [2021-05-21 15:48:59,430 INFO L226 Difference]: Without dead ends: 2138 [2021-05-21 15:48:59,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:48:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-05-21 15:48:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-05-21 15:48:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-05-21 15:48:59,455 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-05-21 15:48:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:59,455 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-05-21 15:48:59,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-05-21 15:48:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:48:59,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:59,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:59,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:59,672 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-05-21 15:48:59,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:59,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634448899] [2021-05-21 15:48:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:59,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:59,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634448899] [2021-05-21 15:48:59,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634448899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:59,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817644514] [2021-05-21 15:48:59,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:59,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 15:48:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:48:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:59,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817644514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:59,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:59,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:48:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083312224] [2021-05-21 15:48:59,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:48:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:48:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:48:59,879 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:00,097 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-05-21 15:49:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:49:00,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:49:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:00,103 INFO L225 Difference]: With dead ends: 2196 [2021-05-21 15:49:00,103 INFO L226 Difference]: Without dead ends: 1621 [2021-05-21 15:49:00,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:49:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-05-21 15:49:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-05-21 15:49:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-05-21 15:49:00,126 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-05-21 15:49:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:00,127 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-05-21 15:49:00,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-05-21 15:49:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 15:49:00,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:00,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:00,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:00,345 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:00,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914011, now seen corresponding path program 1 times [2021-05-21 15:49:00,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:00,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418378746] [2021-05-21 15:49:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:00,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:00,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418378746] [2021-05-21 15:49:00,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418378746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:00,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220063040] [2021-05-21 15:49:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:49:00,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220063040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:00,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:00,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:49:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545344317] [2021-05-21 15:49:00,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:49:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:49:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:49:00,615 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:00,828 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-05-21 15:49:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:49:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 15:49:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:00,834 INFO L225 Difference]: With dead ends: 2068 [2021-05-21 15:49:00,834 INFO L226 Difference]: Without dead ends: 1734 [2021-05-21 15:49:00,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:49:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-05-21 15:49:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-05-21 15:49:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-05-21 15:49:00,866 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-05-21 15:49:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:00,866 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-05-21 15:49:00,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-05-21 15:49:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 15:49:00,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:00,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:01,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:01,087 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1568318167, now seen corresponding path program 2 times [2021-05-21 15:49:01,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:01,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377040075] [2021-05-21 15:49:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:01,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377040075] [2021-05-21 15:49:01,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377040075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614789839] [2021-05-21 15:49:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:01,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:01,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:49:01,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:01,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614789839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:01,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:01,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 15:49:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250173167] [2021-05-21 15:49:01,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 15:49:01,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 15:49:01,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:49:01,283 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:01,360 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-05-21 15:49:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 15:49:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 15:49:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:01,365 INFO L225 Difference]: With dead ends: 2061 [2021-05-21 15:49:01,365 INFO L226 Difference]: Without dead ends: 1791 [2021-05-21 15:49:01,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-05-21 15:49:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-05-21 15:49:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-05-21 15:49:01,386 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-05-21 15:49:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:01,386 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-05-21 15:49:01,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-05-21 15:49:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 15:49:01,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:01,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:01,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-21 15:49:01,605 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406841, now seen corresponding path program 3 times [2021-05-21 15:49:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:01,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847343739] [2021-05-21 15:49:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:01,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:01,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847343739] [2021-05-21 15:49:01,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847343739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666434281] [2021-05-21 15:49:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:01,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:49:01,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:49:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:01,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666434281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:01,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:01,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 15:49:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243515769] [2021-05-21 15:49:01,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:49:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:01,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:49:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:49:01,808 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:01,931 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-05-21 15:49:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:49:01,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 15:49:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:01,935 INFO L225 Difference]: With dead ends: 2006 [2021-05-21 15:49:01,935 INFO L226 Difference]: Without dead ends: 1736 [2021-05-21 15:49:01,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:49:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-05-21 15:49:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-05-21 15:49:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-05-21 15:49:01,956 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-05-21 15:49:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:01,956 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-05-21 15:49:01,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-05-21 15:49:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 15:49:01,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:01,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:02,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:02,175 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash -21240761, now seen corresponding path program 4 times [2021-05-21 15:49:02,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:02,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147387882] [2021-05-21 15:49:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:02,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147387882] [2021-05-21 15:49:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147387882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716125762] [2021-05-21 15:49:02,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:02,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:02,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:49:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716125762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:02,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:02,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 15:49:02,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723036317] [2021-05-21 15:49:02,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 15:49:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 15:49:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:49:02,342 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:02,467 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-05-21 15:49:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:49:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 15:49:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:02,471 INFO L225 Difference]: With dead ends: 2798 [2021-05-21 15:49:02,472 INFO L226 Difference]: Without dead ends: 2528 [2021-05-21 15:49:02,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-05-21 15:49:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-05-21 15:49:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-05-21 15:49:02,499 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-05-21 15:49:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:02,499 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-05-21 15:49:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-05-21 15:49:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-21 15:49:02,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:02,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:02,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:02,717 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1102489, now seen corresponding path program 5 times [2021-05-21 15:49:02,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:02,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785677933] [2021-05-21 15:49:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:02,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785677933] [2021-05-21 15:49:02,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785677933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:02,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434344997] [2021-05-21 15:49:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:02,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:49:02,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:49:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:02,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434344997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:02,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:02,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 15:49:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676412559] [2021-05-21 15:49:02,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:49:02,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:49:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:49:02,883 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:03,040 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-05-21 15:49:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:49:03,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-05-21 15:49:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:03,043 INFO L225 Difference]: With dead ends: 2285 [2021-05-21 15:49:03,043 INFO L226 Difference]: Without dead ends: 1706 [2021-05-21 15:49:03,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:49:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-05-21 15:49:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-05-21 15:49:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-05-21 15:49:03,062 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-05-21 15:49:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:03,063 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-05-21 15:49:03,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-05-21 15:49:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:49:03,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:03,064 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:03,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 15:49:03,285 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 6 times [2021-05-21 15:49:03,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:03,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388716471] [2021-05-21 15:49:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:03,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:03,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388716471] [2021-05-21 15:49:03,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388716471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:03,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474344498] [2021-05-21 15:49:03,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:03,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 15:49:03,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:49:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:03,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474344498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:03,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:03,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 15:49:03,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418772228] [2021-05-21 15:49:03,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:49:03,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:03,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:49:03,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:49:03,467 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:03,619 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-05-21 15:49:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:49:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:49:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:03,622 INFO L225 Difference]: With dead ends: 1931 [2021-05-21 15:49:03,622 INFO L226 Difference]: Without dead ends: 1661 [2021-05-21 15:49:03,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:49:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-05-21 15:49:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-05-21 15:49:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-05-21 15:49:03,643 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-05-21 15:49:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:03,643 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-05-21 15:49:03,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-05-21 15:49:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:49:03,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:03,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:03,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 15:49:03,861 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:03,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 7 times [2021-05-21 15:49:03,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:03,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683760142] [2021-05-21 15:49:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:03,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:03,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683760142] [2021-05-21 15:49:03,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683760142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:03,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495587297] [2021-05-21 15:49:03,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:49:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495587297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:04,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:04,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:49:04,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084495214] [2021-05-21 15:49:04,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:49:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:49:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:49:04,059 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:04,226 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-05-21 15:49:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:49:04,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:49:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:04,229 INFO L225 Difference]: With dead ends: 2111 [2021-05-21 15:49:04,229 INFO L226 Difference]: Without dead ends: 1841 [2021-05-21 15:49:04,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:49:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-05-21 15:49:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-05-21 15:49:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-05-21 15:49:04,250 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-05-21 15:49:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:04,250 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-05-21 15:49:04,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-05-21 15:49:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:49:04,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:04,252 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:04,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 15:49:04,470 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 8 times [2021-05-21 15:49:04,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:04,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901686212] [2021-05-21 15:49:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:04,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901686212] [2021-05-21 15:49:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901686212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191056098] [2021-05-21 15:49:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:04,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:04,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:49:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:04,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191056098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:04,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:04,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 15:49:04,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229002982] [2021-05-21 15:49:04,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:49:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:04,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:49:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:49:04,665 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:04,822 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-05-21 15:49:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:49:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:49:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:04,826 INFO L225 Difference]: With dead ends: 2858 [2021-05-21 15:49:04,827 INFO L226 Difference]: Without dead ends: 2588 [2021-05-21 15:49:04,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:49:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-05-21 15:49:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-05-21 15:49:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-05-21 15:49:04,853 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-05-21 15:49:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:04,853 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-05-21 15:49:04,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-05-21 15:49:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:49:04,855 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:04,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:05,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 15:49:05,057 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:05,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 9 times [2021-05-21 15:49:05,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:05,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482089266] [2021-05-21 15:49:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:05,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:05,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482089266] [2021-05-21 15:49:05,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482089266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:05,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079819028] [2021-05-21 15:49:05,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:05,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:49:05,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:49:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:05,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079819028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:05,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:05,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:49:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833125502] [2021-05-21 15:49:05,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:49:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:49:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:49:05,233 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:05,480 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-05-21 15:49:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:49:05,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:49:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:05,484 INFO L225 Difference]: With dead ends: 2726 [2021-05-21 15:49:05,484 INFO L226 Difference]: Without dead ends: 2151 [2021-05-21 15:49:05,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:49:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-05-21 15:49:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-05-21 15:49:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.7924865831842576) internal successors, (4683), 1677 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-05-21 15:49:05,507 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-05-21 15:49:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:05,507 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-05-21 15:49:05,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-05-21 15:49:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:05,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:05,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:05,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 15:49:05,721 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1642632502, now seen corresponding path program 10 times [2021-05-21 15:49:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:05,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057615278] [2021-05-21 15:49:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:05,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:05,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057615278] [2021-05-21 15:49:05,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057615278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:05,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193324051] [2021-05-21 15:49:05,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:05,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:05,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193324051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:05,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:05,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:49:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100526413] [2021-05-21 15:49:05,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:05,925 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:06,062 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-05-21 15:49:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:49:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:06,066 INFO L225 Difference]: With dead ends: 2468 [2021-05-21 15:49:06,066 INFO L226 Difference]: Without dead ends: 2134 [2021-05-21 15:49:06,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:49:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-05-21 15:49:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-05-21 15:49:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.754256526674234) internal successors, (4853), 1762 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-05-21 15:49:06,092 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-05-21 15:49:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:06,092 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-05-21 15:49:06,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-05-21 15:49:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:06,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:06,094 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:06,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:06,309 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:06,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1005400838, now seen corresponding path program 11 times [2021-05-21 15:49:06,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:06,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501771042] [2021-05-21 15:49:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:06,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:06,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501771042] [2021-05-21 15:49:06,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501771042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:06,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060955565] [2021-05-21 15:49:06,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:06,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:49:06,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:49:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:06,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060955565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:06,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:06,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-05-21 15:49:06,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813003502] [2021-05-21 15:49:06,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:49:06,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:49:06,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:49:06,499 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:06,598 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-05-21 15:49:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:49:06,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:06,602 INFO L225 Difference]: With dead ends: 2561 [2021-05-21 15:49:06,602 INFO L226 Difference]: Without dead ends: 2291 [2021-05-21 15:49:06,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:49:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-05-21 15:49:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-05-21 15:49:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-05-21 15:49:06,623 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-05-21 15:49:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-05-21 15:49:06,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-05-21 15:49:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:06,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:06,625 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:06,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:06,833 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1024918474, now seen corresponding path program 12 times [2021-05-21 15:49:06,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:06,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314738495] [2021-05-21 15:49:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:06,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:06,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314738495] [2021-05-21 15:49:06,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314738495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:06,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969778604] [2021-05-21 15:49:06,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:06,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:49:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:49:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:07,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969778604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:07,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:07,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 15:49:07,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665403] [2021-05-21 15:49:07,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:49:07,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:49:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:49:07,021 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:07,193 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-05-21 15:49:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:49:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:07,204 INFO L225 Difference]: With dead ends: 2446 [2021-05-21 15:49:07,205 INFO L226 Difference]: Without dead ends: 2176 [2021-05-21 15:49:07,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:49:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-21 15:49:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-05-21 15:49:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-05-21 15:49:07,225 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-05-21 15:49:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:07,225 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-05-21 15:49:07,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-05-21 15:49:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:07,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:07,229 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:07,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 15:49:07,437 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1639157944, now seen corresponding path program 13 times [2021-05-21 15:49:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:07,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634226034] [2021-05-21 15:49:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:07,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:07,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634226034] [2021-05-21 15:49:07,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634226034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:07,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565165877] [2021-05-21 15:49:07,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:07,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:49:07,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:07,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565165877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:07,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:07,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-05-21 15:49:07,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951873319] [2021-05-21 15:49:07,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:49:07,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:49:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:49:07,599 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:07,733 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-05-21 15:49:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:49:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:07,736 INFO L225 Difference]: With dead ends: 2421 [2021-05-21 15:49:07,736 INFO L226 Difference]: Without dead ends: 2151 [2021-05-21 15:49:07,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:49:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-05-21 15:49:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-05-21 15:49:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7478897017445134) internal successors, (4883), 1777 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-05-21 15:49:07,757 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-05-21 15:49:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:07,758 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-05-21 15:49:07,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-05-21 15:49:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:07,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:07,760 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:07,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:07,976 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash -76084344, now seen corresponding path program 14 times [2021-05-21 15:49:07,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:07,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640634463] [2021-05-21 15:49:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:08,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640634463] [2021-05-21 15:49:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640634463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650833664] [2021-05-21 15:49:08,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:08,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:08,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:49:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650833664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:08,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:08,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 15:49:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639475054] [2021-05-21 15:49:08,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:49:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:49:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:49:08,154 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:08,350 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-05-21 15:49:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:49:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:08,353 INFO L225 Difference]: With dead ends: 2431 [2021-05-21 15:49:08,353 INFO L226 Difference]: Without dead ends: 2161 [2021-05-21 15:49:08,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:49:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-05-21 15:49:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-05-21 15:49:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.7507034327518287) internal successors, (4888), 1777 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-05-21 15:49:08,372 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-05-21 15:49:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:08,372 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-05-21 15:49:08,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-05-21 15:49:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:08,374 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:08,374 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:08,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 15:49:08,589 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1108731946, now seen corresponding path program 15 times [2021-05-21 15:49:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:08,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036905860] [2021-05-21 15:49:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:08,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036905860] [2021-05-21 15:49:08,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036905860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108304859] [2021-05-21 15:49:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:08,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:49:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:49:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:08,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108304859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:08,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:08,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-05-21 15:49:08,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274740137] [2021-05-21 15:49:08,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:49:08,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:49:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:49:08,750 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:08,903 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-05-21 15:49:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:49:08,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:08,907 INFO L225 Difference]: With dead ends: 3198 [2021-05-21 15:49:08,908 INFO L226 Difference]: Without dead ends: 2928 [2021-05-21 15:49:08,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:49:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-05-21 15:49:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-05-21 15:49:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.783341849770056) internal successors, (5447), 1957 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-05-21 15:49:08,954 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-05-21 15:49:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:08,954 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-05-21 15:49:08,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-05-21 15:49:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-21 15:49:08,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:08,956 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:09,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 15:49:09,177 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1086388696, now seen corresponding path program 16 times [2021-05-21 15:49:09,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:09,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314119145] [2021-05-21 15:49:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:09,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:09,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314119145] [2021-05-21 15:49:09,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314119145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:09,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562442360] [2021-05-21 15:49:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:09,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:09,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:49:09,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:09,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562442360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:09,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:09,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 15:49:09,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554600063] [2021-05-21 15:49:09,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:49:09,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:09,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:49:09,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:49:09,362 INFO L87 Difference]: Start difference. First operand 1958 states and 5447 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:09,621 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-05-21 15:49:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:49:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-05-21 15:49:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:09,624 INFO L225 Difference]: With dead ends: 3021 [2021-05-21 15:49:09,624 INFO L226 Difference]: Without dead ends: 2446 [2021-05-21 15:49:09,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:49:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-05-21 15:49:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-05-21 15:49:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.7265917602996255) internal successors, (4368), 1602 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-05-21 15:49:09,653 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-05-21 15:49:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:09,653 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-05-21 15:49:09,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-05-21 15:49:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:49:09,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:09,656 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:09,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 15:49:09,872 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 17 times [2021-05-21 15:49:09,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:09,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5624500] [2021-05-21 15:49:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:09,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:09,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5624500] [2021-05-21 15:49:09,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5624500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:09,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348404538] [2021-05-21 15:49:09,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:09,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:49:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:10,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348404538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:10,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:10,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:49:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581718636] [2021-05-21 15:49:10,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:49:10,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:10,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:49:10,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:49:10,065 INFO L87 Difference]: Start difference. First operand 1603 states and 4368 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:10,214 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-05-21 15:49:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:49:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:49:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:10,216 INFO L225 Difference]: With dead ends: 2321 [2021-05-21 15:49:10,216 INFO L226 Difference]: Without dead ends: 2051 [2021-05-21 15:49:10,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:49:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-05-21 15:49:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-05-21 15:49:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.738819320214669) internal successors, (4593), 1677 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-05-21 15:49:10,236 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-05-21 15:49:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:10,237 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-05-21 15:49:10,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-05-21 15:49:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:49:10,238 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:10,238 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:10,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 15:49:10,454 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 18 times [2021-05-21 15:49:10,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:10,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323957950] [2021-05-21 15:49:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:10,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:10,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323957950] [2021-05-21 15:49:10,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323957950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:10,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139928227] [2021-05-21 15:49:10,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:10,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:49:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:10,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139928227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:10,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:10,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:49:10,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654133622] [2021-05-21 15:49:10,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:10,668 INFO L87 Difference]: Start difference. First operand 1678 states and 4593 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:10,862 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-05-21 15:49:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:49:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:49:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:10,865 INFO L225 Difference]: With dead ends: 2491 [2021-05-21 15:49:10,865 INFO L226 Difference]: Without dead ends: 2221 [2021-05-21 15:49:10,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:49:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-05-21 15:49:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-05-21 15:49:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.75) internal successors, (4818), 1752 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-05-21 15:49:10,886 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-05-21 15:49:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:10,886 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-05-21 15:49:10,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-05-21 15:49:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:49:10,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:10,888 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:11,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 15:49:11,103 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 19 times [2021-05-21 15:49:11,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:11,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436872287] [2021-05-21 15:49:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:11,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:11,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436872287] [2021-05-21 15:49:11,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436872287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:11,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274076091] [2021-05-21 15:49:11,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:11,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274076091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:11,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:11,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:49:11,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780167535] [2021-05-21 15:49:11,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:49:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:49:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:49:11,303 INFO L87 Difference]: Start difference. First operand 1753 states and 4818 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:11,497 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-05-21 15:49:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:49:11,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:49:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:11,500 INFO L225 Difference]: With dead ends: 2566 [2021-05-21 15:49:11,500 INFO L226 Difference]: Without dead ends: 2296 [2021-05-21 15:49:11,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:49:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-21 15:49:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-05-21 15:49:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.768472906403941) internal successors, (5058), 1827 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-05-21 15:49:11,522 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-05-21 15:49:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:11,522 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-05-21 15:49:11,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-05-21 15:49:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:49:11,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:11,524 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:11,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:11,737 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 20 times [2021-05-21 15:49:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:11,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134358827] [2021-05-21 15:49:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:11,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:11,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134358827] [2021-05-21 15:49:11,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134358827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:11,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963782046] [2021-05-21 15:49:11,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:11,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963782046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:11,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:11,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:49:11,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167784062] [2021-05-21 15:49:11,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:11,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:11,926 INFO L87 Difference]: Start difference. First operand 1828 states and 5058 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:12,206 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-05-21 15:49:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:49:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:12,209 INFO L225 Difference]: With dead ends: 3144 [2021-05-21 15:49:12,209 INFO L226 Difference]: Without dead ends: 2521 [2021-05-21 15:49:12,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:49:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-05-21 15:49:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-05-21 15:49:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.780231335436383) internal successors, (5288), 1902 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-05-21 15:49:12,233 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-05-21 15:49:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:12,233 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-05-21 15:49:12,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-05-21 15:49:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:49:12,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:12,235 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:12,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 15:49:12,449 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 21 times [2021-05-21 15:49:12,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:12,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045940272] [2021-05-21 15:49:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:12,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:12,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045940272] [2021-05-21 15:49:12,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045940272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:12,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643675386] [2021-05-21 15:49:12,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:12,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:49:12,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:12,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643675386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:12,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:12,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:49:12,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655240243] [2021-05-21 15:49:12,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:49:12,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:49:12,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:49:12,625 INFO L87 Difference]: Start difference. First operand 1903 states and 5288 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:12,823 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-05-21 15:49:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:49:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:49:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:12,827 INFO L225 Difference]: With dead ends: 3348 [2021-05-21 15:49:12,827 INFO L226 Difference]: Without dead ends: 3078 [2021-05-21 15:49:12,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:49:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-05-21 15:49:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-05-21 15:49:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.80835734870317) internal successors, (5847), 2082 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-05-21 15:49:12,854 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-05-21 15:49:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:12,854 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-05-21 15:49:12,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-05-21 15:49:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:49:12,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:12,856 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:13,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:13,069 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 22 times [2021-05-21 15:49:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:13,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158148213] [2021-05-21 15:49:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:13,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:13,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158148213] [2021-05-21 15:49:13,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158148213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:13,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607159838] [2021-05-21 15:49:13,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:13,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:13,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:49:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:13,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607159838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:13,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:13,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:49:13,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470586070] [2021-05-21 15:49:13,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:13,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:13,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:13,251 INFO L87 Difference]: Start difference. First operand 2083 states and 5847 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:13,598 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-05-21 15:49:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:49:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:49:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:13,601 INFO L225 Difference]: With dead ends: 3216 [2021-05-21 15:49:13,601 INFO L226 Difference]: Without dead ends: 2641 [2021-05-21 15:49:13,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:49:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-05-21 15:49:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-05-21 15:49:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.7288246881155613) internal successors, (4156), 1523 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-05-21 15:49:13,620 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-05-21 15:49:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:13,620 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-05-21 15:49:13,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-05-21 15:49:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:13,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:13,622 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:13,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 15:49:13,837 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-05-21 15:49:13,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:13,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451062582] [2021-05-21 15:49:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:13,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:13,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451062582] [2021-05-21 15:49:13,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451062582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:13,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898853897] [2021-05-21 15:49:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:13,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:49:13,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:14,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898853897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:14,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:14,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-05-21 15:49:14,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587910133] [2021-05-21 15:49:14,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:14,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:14,088 INFO L87 Difference]: Start difference. First operand 1524 states and 4156 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:14,300 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-05-21 15:49:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:49:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:14,303 INFO L225 Difference]: With dead ends: 2364 [2021-05-21 15:49:14,303 INFO L226 Difference]: Without dead ends: 2030 [2021-05-21 15:49:14,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:49:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-05-21 15:49:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-05-21 15:49:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.6902985074626864) internal successors, (4326), 1608 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-05-21 15:49:14,323 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-05-21 15:49:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:14,323 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-05-21 15:49:14,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-05-21 15:49:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:14,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:14,325 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:14,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:14,540 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-05-21 15:49:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:14,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837569006] [2021-05-21 15:49:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:14,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:14,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837569006] [2021-05-21 15:49:14,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837569006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:14,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030688340] [2021-05-21 15:49:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:14,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:49:14,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030688340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:14,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:14,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:49:14,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340212647] [2021-05-21 15:49:14,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:14,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:14,747 INFO L87 Difference]: Start difference. First operand 1609 states and 4326 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:14,876 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-05-21 15:49:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:49:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:14,879 INFO L225 Difference]: With dead ends: 2686 [2021-05-21 15:49:14,879 INFO L226 Difference]: Without dead ends: 2416 [2021-05-21 15:49:14,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:49:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-05-21 15:49:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-05-21 15:49:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 2.7071917808219177) internal successors, (4743), 1752 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-05-21 15:49:14,900 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-05-21 15:49:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:14,900 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-05-21 15:49:14,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-05-21 15:49:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:14,902 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:14,902 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:15,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 15:49:15,117 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-05-21 15:49:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:15,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203391837] [2021-05-21 15:49:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:15,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203391837] [2021-05-21 15:49:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203391837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798858269] [2021-05-21 15:49:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:15,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:15,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:15,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798858269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:15,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:15,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:49:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575402052] [2021-05-21 15:49:15,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:15,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:15,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:15,348 INFO L87 Difference]: Start difference. First operand 1753 states and 4743 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:15,519 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-05-21 15:49:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:49:15,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:15,521 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 15:49:15,521 INFO L226 Difference]: Without dead ends: 2376 [2021-05-21 15:49:15,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:49:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-05-21 15:49:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-05-21 15:49:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.7192118226600983) internal successors, (4968), 1827 states have internal predecessors, (4968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-05-21 15:49:15,542 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-05-21 15:49:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:15,542 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-05-21 15:49:15,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-05-21 15:49:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:15,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:15,544 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:15,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:15,757 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-05-21 15:49:15,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:15,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048136842] [2021-05-21 15:49:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:15,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:15,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048136842] [2021-05-21 15:49:15,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048136842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:15,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621772404] [2021-05-21 15:49:15,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:15,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:15,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621772404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:15,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:15,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:49:15,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564308230] [2021-05-21 15:49:15,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:15,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:15,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:15,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:15,974 INFO L87 Difference]: Start difference. First operand 1828 states and 4968 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:16,126 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-05-21 15:49:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:49:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:16,128 INFO L225 Difference]: With dead ends: 2696 [2021-05-21 15:49:16,128 INFO L226 Difference]: Without dead ends: 2426 [2021-05-21 15:49:16,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:49:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-05-21 15:49:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-05-21 15:49:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.730283911671924) internal successors, (5193), 1902 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-05-21 15:49:16,148 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-05-21 15:49:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:16,148 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-05-21 15:49:16,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-05-21 15:49:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:16,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:16,150 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:16,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 15:49:16,358 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-05-21 15:49:16,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:16,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706627531] [2021-05-21 15:49:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:16,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:16,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706627531] [2021-05-21 15:49:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706627531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:16,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317058792] [2021-05-21 15:49:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:16,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:49:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:16,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317058792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:16,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:16,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:49:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118958108] [2021-05-21 15:49:16,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:16,591 INFO L87 Difference]: Start difference. First operand 1903 states and 5193 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:16,820 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-05-21 15:49:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:49:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:16,823 INFO L225 Difference]: With dead ends: 2721 [2021-05-21 15:49:16,823 INFO L226 Difference]: Without dead ends: 2451 [2021-05-21 15:49:16,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:49:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-05-21 15:49:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-05-21 15:49:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.74051593323217) internal successors, (5418), 1977 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-05-21 15:49:16,846 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-05-21 15:49:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:16,847 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-05-21 15:49:16,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-05-21 15:49:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:16,849 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:16,849 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:17,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:17,064 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-05-21 15:49:17,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:17,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931180599] [2021-05-21 15:49:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:17,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:17,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931180599] [2021-05-21 15:49:17,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931180599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:17,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679178705] [2021-05-21 15:49:17,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:17,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:17,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679178705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:17,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:17,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:49:17,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929369587] [2021-05-21 15:49:17,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:17,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:17,261 INFO L87 Difference]: Start difference. First operand 1978 states and 5418 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:17,450 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-05-21 15:49:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:49:17,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:17,453 INFO L225 Difference]: With dead ends: 2791 [2021-05-21 15:49:17,453 INFO L226 Difference]: Without dead ends: 2521 [2021-05-21 15:49:17,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:49:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-05-21 15:49:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-05-21 15:49:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.757309941520468) internal successors, (5658), 2052 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-05-21 15:49:17,476 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-05-21 15:49:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:17,476 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-05-21 15:49:17,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-05-21 15:49:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:17,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:17,478 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:17,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 15:49:17,679 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:17,679 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-05-21 15:49:17,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:17,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723337431] [2021-05-21 15:49:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:17,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:17,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723337431] [2021-05-21 15:49:17,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723337431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:17,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799025212] [2021-05-21 15:49:17,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:17,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:49:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:17,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799025212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:17,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:17,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:49:17,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232965969] [2021-05-21 15:49:17,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:17,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:17,870 INFO L87 Difference]: Start difference. First operand 2053 states and 5658 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:18,168 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-05-21 15:49:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:49:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:18,172 INFO L225 Difference]: With dead ends: 3369 [2021-05-21 15:49:18,172 INFO L226 Difference]: Without dead ends: 2746 [2021-05-21 15:49:18,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:49:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-05-21 15:49:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-05-21 15:49:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-05-21 15:49:18,216 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-05-21 15:49:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:18,217 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-05-21 15:49:18,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-05-21 15:49:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:18,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:18,220 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:18,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 15:49:18,421 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-05-21 15:49:18,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:18,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806597653] [2021-05-21 15:49:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:18,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806597653] [2021-05-21 15:49:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806597653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464752200] [2021-05-21 15:49:18,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:18,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:49:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:18,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464752200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:18,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:18,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:49:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82003032] [2021-05-21 15:49:18,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:49:18,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:49:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:49:18,614 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:18,814 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-05-21 15:49:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:49:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:18,818 INFO L225 Difference]: With dead ends: 3598 [2021-05-21 15:49:18,818 INFO L226 Difference]: Without dead ends: 3328 [2021-05-21 15:49:18,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:49:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-05-21 15:49:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-05-21 15:49:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-05-21 15:49:18,844 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-05-21 15:49:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-05-21 15:49:18,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-05-21 15:49:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-21 15:49:18,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:18,847 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:19,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 15:49:19,057 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-05-21 15:49:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:19,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114390168] [2021-05-21 15:49:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:19,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:19,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114390168] [2021-05-21 15:49:19,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114390168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:19,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141398758] [2021-05-21 15:49:19,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:49:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141398758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:19,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:19,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-05-21 15:49:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897863193] [2021-05-21 15:49:19,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:19,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:19,243 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:19,571 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-05-21 15:49:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:49:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-05-21 15:49:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:19,573 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 15:49:19,574 INFO L226 Difference]: Without dead ends: 2846 [2021-05-21 15:49:19,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-05-21 15:49:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-05-21 15:49:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-05-21 15:49:19,593 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-05-21 15:49:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:19,593 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-05-21 15:49:19,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-05-21 15:49:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:19,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:19,595 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:19,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 15:49:19,796 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:19,796 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-05-21 15:49:19,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:19,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836623761] [2021-05-21 15:49:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:19,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:19,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836623761] [2021-05-21 15:49:19,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836623761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:19,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451134486] [2021-05-21 15:49:19,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:19,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:20,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451134486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:20,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:20,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:49:20,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517553918] [2021-05-21 15:49:20,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:20,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:20,052 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:20,206 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-05-21 15:49:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:49:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:20,209 INFO L225 Difference]: With dead ends: 2621 [2021-05-21 15:49:20,209 INFO L226 Difference]: Without dead ends: 2351 [2021-05-21 15:49:20,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:49:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-21 15:49:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-05-21 15:49:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-05-21 15:49:20,229 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-05-21 15:49:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:20,229 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-05-21 15:49:20,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-05-21 15:49:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:20,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:20,231 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:20,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:20,445 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-05-21 15:49:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620550574] [2021-05-21 15:49:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:20,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:20,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620550574] [2021-05-21 15:49:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620550574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672499092] [2021-05-21 15:49:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:20,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:49:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:20,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:20,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672499092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:20,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:20,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:49:20,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287057944] [2021-05-21 15:49:20,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:20,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:20,683 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:20,890 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-05-21 15:49:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:49:20,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:20,893 INFO L225 Difference]: With dead ends: 2841 [2021-05-21 15:49:20,893 INFO L226 Difference]: Without dead ends: 2571 [2021-05-21 15:49:20,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:49:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-05-21 15:49:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-05-21 15:49:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-05-21 15:49:20,914 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-05-21 15:49:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:20,914 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-05-21 15:49:20,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-05-21 15:49:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:20,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:20,916 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:21,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 15:49:21,117 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-05-21 15:49:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624988973] [2021-05-21 15:49:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:21,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:21,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624988973] [2021-05-21 15:49:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624988973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633475332] [2021-05-21 15:49:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:21,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:21,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:21,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:21,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:21,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633475332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:21,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:21,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:49:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137243218] [2021-05-21 15:49:21,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:21,340 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:21,532 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-05-21 15:49:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:49:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:21,535 INFO L225 Difference]: With dead ends: 2871 [2021-05-21 15:49:21,535 INFO L226 Difference]: Without dead ends: 2601 [2021-05-21 15:49:21,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:49:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-21 15:49:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-05-21 15:49:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-05-21 15:49:21,558 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-05-21 15:49:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:21,558 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-05-21 15:49:21,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-05-21 15:49:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:21,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:21,560 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:21,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 15:49:21,773 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-05-21 15:49:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:21,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85130856] [2021-05-21 15:49:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:21,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:21,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85130856] [2021-05-21 15:49:21,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85130856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:21,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015862630] [2021-05-21 15:49:21,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:21,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:49:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:22,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015862630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:22,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:22,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:49:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015705000] [2021-05-21 15:49:22,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:22,010 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:22,257 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-05-21 15:49:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:22,260 INFO L225 Difference]: With dead ends: 2896 [2021-05-21 15:49:22,261 INFO L226 Difference]: Without dead ends: 2626 [2021-05-21 15:49:22,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:49:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-21 15:49:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-05-21 15:49:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-05-21 15:49:22,287 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-05-21 15:49:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:22,287 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-05-21 15:49:22,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-05-21 15:49:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:22,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:22,290 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:22,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:22,496 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-05-21 15:49:22,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:22,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71280859] [2021-05-21 15:49:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:22,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:22,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71280859] [2021-05-21 15:49:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71280859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:22,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927369435] [2021-05-21 15:49:22,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:22,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:49:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:22,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927369435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:22,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:22,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:49:22,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124275758] [2021-05-21 15:49:22,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:22,696 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:22,953 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-05-21 15:49:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:49:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:22,956 INFO L225 Difference]: With dead ends: 2966 [2021-05-21 15:49:22,956 INFO L226 Difference]: Without dead ends: 2696 [2021-05-21 15:49:22,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:49:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-05-21 15:49:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-05-21 15:49:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-05-21 15:49:22,984 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-05-21 15:49:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:22,984 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-05-21 15:49:22,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-05-21 15:49:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:22,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:22,986 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:23,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 15:49:23,187 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-05-21 15:49:23,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:23,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256688267] [2021-05-21 15:49:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:23,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:23,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256688267] [2021-05-21 15:49:23,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256688267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:23,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857389467] [2021-05-21 15:49:23,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:23,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857389467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:23,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:23,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:49:23,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960280725] [2021-05-21 15:49:23,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:23,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:23,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:23,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:23,393 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:23,733 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-05-21 15:49:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:49:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:23,736 INFO L225 Difference]: With dead ends: 3544 [2021-05-21 15:49:23,736 INFO L226 Difference]: Without dead ends: 2921 [2021-05-21 15:49:23,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-21 15:49:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-05-21 15:49:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-05-21 15:49:23,759 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-05-21 15:49:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:23,759 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-05-21 15:49:23,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-05-21 15:49:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:23,761 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:23,761 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:23,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:23,977 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-05-21 15:49:23,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:23,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792845913] [2021-05-21 15:49:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:24,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792845913] [2021-05-21 15:49:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792845913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749352444] [2021-05-21 15:49:24,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:24,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749352444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:24,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:24,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:49:24,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846871065] [2021-05-21 15:49:24,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:49:24,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:49:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:49:24,165 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:24,406 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-05-21 15:49:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:49:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:24,410 INFO L225 Difference]: With dead ends: 3748 [2021-05-21 15:49:24,410 INFO L226 Difference]: Without dead ends: 3478 [2021-05-21 15:49:24,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:49:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-05-21 15:49:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-05-21 15:49:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-05-21 15:49:24,439 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-05-21 15:49:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:24,439 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-05-21 15:49:24,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-05-21 15:49:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:49:24,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:24,441 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:24,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 15:49:24,642 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-05-21 15:49:24,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:24,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495317589] [2021-05-21 15:49:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:24,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495317589] [2021-05-21 15:49:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495317589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263867716] [2021-05-21 15:49:24,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:24,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:49:24,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:49:24,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:24,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263867716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:24,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:24,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:49:24,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725952816] [2021-05-21 15:49:24,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:24,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:24,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:24,844 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:25,238 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-05-21 15:49:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:49:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:49:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:25,241 INFO L225 Difference]: With dead ends: 3616 [2021-05-21 15:49:25,241 INFO L226 Difference]: Without dead ends: 3041 [2021-05-21 15:49:25,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:49:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-05-21 15:49:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-05-21 15:49:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.731282646546721) internal successors, (4706), 1723 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-05-21 15:49:25,263 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-05-21 15:49:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:25,264 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-05-21 15:49:25,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-05-21 15:49:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:25,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:25,265 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:25,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:25,466 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-05-21 15:49:25,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:25,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198136590] [2021-05-21 15:49:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:25,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198136590] [2021-05-21 15:49:25,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198136590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:25,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911131794] [2021-05-21 15:49:25,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:25,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:25,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:25,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911131794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:25,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:25,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-05-21 15:49:25,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521453495] [2021-05-21 15:49:25,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:49:25,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:49:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:49:25,734 INFO L87 Difference]: Start difference. First operand 1724 states and 4706 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:25,946 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-05-21 15:49:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:49:25,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:25,949 INFO L225 Difference]: With dead ends: 2614 [2021-05-21 15:49:25,949 INFO L226 Difference]: Without dead ends: 2280 [2021-05-21 15:49:25,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:49:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-05-21 15:49:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-05-21 15:49:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 2.6969026548672566) internal successors, (4876), 1808 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-05-21 15:49:25,968 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-05-21 15:49:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:25,968 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-05-21 15:49:25,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-05-21 15:49:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:25,970 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:25,970 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:26,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 15:49:26,170 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-05-21 15:49:26,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:26,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037453831] [2021-05-21 15:49:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:26,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037453831] [2021-05-21 15:49:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037453831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36005816] [2021-05-21 15:49:26,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:26,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:49:26,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:26,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36005816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:26,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:26,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:49:26,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327942918] [2021-05-21 15:49:26,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:26,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:26,416 INFO L87 Difference]: Start difference. First operand 1809 states and 4876 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:26,598 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-05-21 15:49:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:49:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:26,601 INFO L225 Difference]: With dead ends: 3036 [2021-05-21 15:49:26,601 INFO L226 Difference]: Without dead ends: 2766 [2021-05-21 15:49:26,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:49:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-05-21 15:49:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-05-21 15:49:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.711577868852459) internal successors, (5293), 1952 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-05-21 15:49:26,623 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-05-21 15:49:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:26,623 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-05-21 15:49:26,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-05-21 15:49:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:26,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:26,625 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:26,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 15:49:26,837 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-05-21 15:49:26,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:26,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591271726] [2021-05-21 15:49:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591271726] [2021-05-21 15:49:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591271726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329646790] [2021-05-21 15:49:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:26,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:49:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:27,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329646790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:27,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:27,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 15:49:27,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316149387] [2021-05-21 15:49:27,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:27,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:27,107 INFO L87 Difference]: Start difference. First operand 1953 states and 5293 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:27,332 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-05-21 15:49:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:49:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:27,335 INFO L225 Difference]: With dead ends: 2996 [2021-05-21 15:49:27,335 INFO L226 Difference]: Without dead ends: 2726 [2021-05-21 15:49:27,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:49:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-05-21 15:49:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-05-21 15:49:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.7222496299950665) internal successors, (5518), 2027 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-05-21 15:49:27,357 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-05-21 15:49:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:27,358 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-05-21 15:49:27,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-05-21 15:49:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:27,359 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:27,359 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:27,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:27,560 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-05-21 15:49:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87638663] [2021-05-21 15:49:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87638663] [2021-05-21 15:49:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87638663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731483192] [2021-05-21 15:49:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731483192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:27,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:49:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919286552] [2021-05-21 15:49:27,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:27,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:27,789 INFO L87 Difference]: Start difference. First operand 2028 states and 5518 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:27,961 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-05-21 15:49:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:49:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:27,965 INFO L225 Difference]: With dead ends: 3046 [2021-05-21 15:49:27,965 INFO L226 Difference]: Without dead ends: 2776 [2021-05-21 15:49:27,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:49:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-05-21 15:49:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-05-21 15:49:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7321598477640343) internal successors, (5743), 2102 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-05-21 15:49:27,987 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-05-21 15:49:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:27,987 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-05-21 15:49:27,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-05-21 15:49:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:27,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:27,989 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:28,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-21 15:49:28,190 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:28,190 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-05-21 15:49:28,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:28,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018486502] [2021-05-21 15:49:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:28,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:28,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018486502] [2021-05-21 15:49:28,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018486502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077627729] [2021-05-21 15:49:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:28,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:28,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077627729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:28,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:28,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 15:49:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566137844] [2021-05-21 15:49:28,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:28,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:28,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:28,424 INFO L87 Difference]: Start difference. First operand 2103 states and 5743 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:28,669 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-05-21 15:49:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:28,672 INFO L225 Difference]: With dead ends: 3071 [2021-05-21 15:49:28,672 INFO L226 Difference]: Without dead ends: 2801 [2021-05-21 15:49:28,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:49:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-05-21 15:49:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-05-21 15:49:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.7413872301332107) internal successors, (5968), 2177 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-05-21 15:49:28,695 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-05-21 15:49:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:28,695 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-05-21 15:49:28,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-05-21 15:49:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:28,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:28,696 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:28,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:28,901 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-05-21 15:49:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:28,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888774827] [2021-05-21 15:49:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:28,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:28,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888774827] [2021-05-21 15:49:28,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888774827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:28,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393388159] [2021-05-21 15:49:28,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:29,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:49:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:29,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393388159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:29,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:29,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:49:29,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742598642] [2021-05-21 15:49:29,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:29,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:29,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:29,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:29,127 INFO L87 Difference]: Start difference. First operand 2178 states and 5968 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:29,327 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-05-21 15:49:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:49:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:29,330 INFO L225 Difference]: With dead ends: 3096 [2021-05-21 15:49:29,330 INFO L226 Difference]: Without dead ends: 2826 [2021-05-21 15:49:29,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:49:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-05-21 15:49:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-05-21 15:49:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.75) internal successors, (6193), 2252 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-05-21 15:49:29,354 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-05-21 15:49:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:29,354 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-05-21 15:49:29,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-05-21 15:49:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:29,356 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:29,356 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:29,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:29,556 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-05-21 15:49:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:29,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288063540] [2021-05-21 15:49:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:29,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288063540] [2021-05-21 15:49:29,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288063540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449391627] [2021-05-21 15:49:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:29,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:29,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:29,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449391627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:29,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:29,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 15:49:29,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835922578] [2021-05-21 15:49:29,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:29,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:29,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:29,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:29,767 INFO L87 Difference]: Start difference. First operand 2253 states and 6193 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:30,056 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-05-21 15:49:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:49:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:30,059 INFO L225 Difference]: With dead ends: 3121 [2021-05-21 15:49:30,059 INFO L226 Difference]: Without dead ends: 2851 [2021-05-21 15:49:30,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:49:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-05-21 15:49:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-05-21 15:49:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.758057584873227) internal successors, (6418), 2327 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-05-21 15:49:30,083 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-05-21 15:49:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:30,083 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-05-21 15:49:30,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-05-21 15:49:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:30,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:30,085 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:30,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 15:49:30,286 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-05-21 15:49:30,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:30,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401503666] [2021-05-21 15:49:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:30,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:30,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401503666] [2021-05-21 15:49:30,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401503666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:30,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100498563] [2021-05-21 15:49:30,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:30,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:49:30,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:30,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100498563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:30,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:30,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:49:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253461599] [2021-05-21 15:49:30,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:30,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:30,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:30,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:30,499 INFO L87 Difference]: Start difference. First operand 2328 states and 6418 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:30,735 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-05-21 15:49:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:49:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:30,738 INFO L225 Difference]: With dead ends: 3191 [2021-05-21 15:49:30,738 INFO L226 Difference]: Without dead ends: 2921 [2021-05-21 15:49:30,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:49:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-21 15:49:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-05-21 15:49:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 2.7718567860116567) internal successors, (6658), 2402 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-05-21 15:49:30,762 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-05-21 15:49:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:30,762 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-05-21 15:49:30,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-05-21 15:49:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:30,764 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:30,764 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:30,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:30,965 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:30,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-05-21 15:49:30,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:30,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715892508] [2021-05-21 15:49:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:31,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:31,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715892508] [2021-05-21 15:49:31,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715892508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:31,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314961406] [2021-05-21 15:49:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:31,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:49:31,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:31,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:31,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314961406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:31,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:31,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 15:49:31,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568449983] [2021-05-21 15:49:31,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:31,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:31,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:31,194 INFO L87 Difference]: Start difference. First operand 2403 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:31,545 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-05-21 15:49:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:49:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:31,549 INFO L225 Difference]: With dead ends: 3769 [2021-05-21 15:49:31,549 INFO L226 Difference]: Without dead ends: 3146 [2021-05-21 15:49:31,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:49:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-05-21 15:49:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-05-21 15:49:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7807832054905126) internal successors, (6888), 2477 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-05-21 15:49:31,574 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-05-21 15:49:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:31,574 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-05-21 15:49:31,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-05-21 15:49:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:31,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:31,576 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:31,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 15:49:31,776 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-05-21 15:49:31,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:31,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357866462] [2021-05-21 15:49:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:31,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:31,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357866462] [2021-05-21 15:49:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357866462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:31,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144284511] [2021-05-21 15:49:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:31,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144284511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:31,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:31,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:49:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146351850] [2021-05-21 15:49:31,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:49:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:31,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:49:31,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:49:31,982 INFO L87 Difference]: Start difference. First operand 2478 states and 6888 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:32,233 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-05-21 15:49:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:49:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:32,237 INFO L225 Difference]: With dead ends: 3998 [2021-05-21 15:49:32,237 INFO L226 Difference]: Without dead ends: 3728 [2021-05-21 15:49:32,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:49:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-05-21 15:49:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-05-21 15:49:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 2.8027850959729017) internal successors, (7447), 2657 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-05-21 15:49:32,266 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-05-21 15:49:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:32,266 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-05-21 15:49:32,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-05-21 15:49:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:49:32,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:32,268 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:32,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 15:49:32,481 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-05-21 15:49:32,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:32,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879318437] [2021-05-21 15:49:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:32,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:32,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879318437] [2021-05-21 15:49:32,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879318437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:32,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373595745] [2021-05-21 15:49:32,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:32,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:32,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:49:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:32,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373595745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:32,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:32,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 15:49:32,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145194311] [2021-05-21 15:49:32,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:32,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:32,692 INFO L87 Difference]: Start difference. First operand 2658 states and 7447 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:33,103 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-05-21 15:49:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:49:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:49:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:33,107 INFO L225 Difference]: With dead ends: 3821 [2021-05-21 15:49:33,107 INFO L226 Difference]: Without dead ends: 3246 [2021-05-21 15:49:33,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:49:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-05-21 15:49:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-05-21 15:49:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 2.7312687312687314) internal successors, (5468), 2002 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-05-21 15:49:33,129 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-05-21 15:49:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:33,130 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-05-21 15:49:33,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-05-21 15:49:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:33,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:33,131 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:33,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 15:49:33,332 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-05-21 15:49:33,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:33,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005439782] [2021-05-21 15:49:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:33,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:33,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005439782] [2021-05-21 15:49:33,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005439782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:33,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180813296] [2021-05-21 15:49:33,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:49:33,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:33,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180813296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:33,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:33,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:49:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299682047] [2021-05-21 15:49:33,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:33,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:33,610 INFO L87 Difference]: Start difference. First operand 2003 states and 5468 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:33,797 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-05-21 15:49:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:49:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:33,800 INFO L225 Difference]: With dead ends: 2921 [2021-05-21 15:49:33,800 INFO L226 Difference]: Without dead ends: 2651 [2021-05-21 15:49:33,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:49:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-05-21 15:49:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-05-21 15:49:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.740972556571979) internal successors, (5693), 2077 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-05-21 15:49:33,820 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-05-21 15:49:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:33,820 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-05-21 15:49:33,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-05-21 15:49:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:33,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:33,822 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:34,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 15:49:34,023 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-05-21 15:49:34,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:34,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883326965] [2021-05-21 15:49:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:34,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:34,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883326965] [2021-05-21 15:49:34,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883326965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:34,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554902704] [2021-05-21 15:49:34,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:34,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:34,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554902704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:34,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:34,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:49:34,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704716448] [2021-05-21 15:49:34,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:34,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:34,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:34,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:34,265 INFO L87 Difference]: Start difference. First operand 2078 states and 5693 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:34,507 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-05-21 15:49:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:34,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:34,510 INFO L225 Difference]: With dead ends: 3191 [2021-05-21 15:49:34,510 INFO L226 Difference]: Without dead ends: 2921 [2021-05-21 15:49:34,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:49:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-05-21 15:49:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-05-21 15:49:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.75) internal successors, (5918), 2152 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-05-21 15:49:34,531 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-05-21 15:49:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:34,531 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-05-21 15:49:34,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-05-21 15:49:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:34,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:34,533 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:34,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:34,734 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-05-21 15:49:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:34,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312025830] [2021-05-21 15:49:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:34,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312025830] [2021-05-21 15:49:34,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312025830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:34,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413744577] [2021-05-21 15:49:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:34,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:49:34,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:34,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:34,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413744577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:34,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:34,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:49:34,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69845116] [2021-05-21 15:49:34,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:34,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:34,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:34,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:34,965 INFO L87 Difference]: Start difference. First operand 2153 states and 5918 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:35,185 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-05-21 15:49:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:49:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:35,188 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 15:49:35,188 INFO L226 Difference]: Without dead ends: 2951 [2021-05-21 15:49:35,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:49:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-05-21 15:49:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-05-21 15:49:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.7584193982936687) internal successors, (6143), 2227 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-05-21 15:49:35,212 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-05-21 15:49:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:35,212 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-05-21 15:49:35,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-05-21 15:49:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:35,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:35,214 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:35,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:35,428 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-05-21 15:49:35,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:35,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699526980] [2021-05-21 15:49:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:35,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:35,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699526980] [2021-05-21 15:49:35,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699526980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:35,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433992761] [2021-05-21 15:49:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:35,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:49:35,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:35,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:35,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433992761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:35,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:35,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:49:35,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940365868] [2021-05-21 15:49:35,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:35,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:35,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:35,764 INFO L87 Difference]: Start difference. First operand 2228 states and 6143 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:36,042 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-05-21 15:49:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:49:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:36,045 INFO L225 Difference]: With dead ends: 3246 [2021-05-21 15:49:36,046 INFO L226 Difference]: Without dead ends: 2976 [2021-05-21 15:49:36,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-05-21 15:49:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-05-21 15:49:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7662901824500437) internal successors, (6368), 2302 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-05-21 15:49:36,074 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-05-21 15:49:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:36,075 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-05-21 15:49:36,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-05-21 15:49:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:36,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:36,077 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:36,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:36,277 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-05-21 15:49:36,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:36,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452223876] [2021-05-21 15:49:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:36,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:36,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452223876] [2021-05-21 15:49:36,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452223876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:36,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153462204] [2021-05-21 15:49:36,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:36,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153462204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:36,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:36,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:49:36,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222382226] [2021-05-21 15:49:36,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:36,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:36,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:36,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:36,514 INFO L87 Difference]: Start difference. First operand 2303 states and 6368 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:36,761 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-05-21 15:49:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:49:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:36,764 INFO L225 Difference]: With dead ends: 3271 [2021-05-21 15:49:36,764 INFO L226 Difference]: Without dead ends: 3001 [2021-05-21 15:49:36,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-05-21 15:49:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-05-21 15:49:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7736642827092974) internal successors, (6593), 2377 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-05-21 15:49:36,799 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-05-21 15:49:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:36,799 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-05-21 15:49:36,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-05-21 15:49:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:36,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:36,801 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:37,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-21 15:49:37,012 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-05-21 15:49:37,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:37,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153082532] [2021-05-21 15:49:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:37,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153082532] [2021-05-21 15:49:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153082532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363848580] [2021-05-21 15:49:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:37,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:37,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:37,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:37,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363848580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:37,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:37,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:49:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329407471] [2021-05-21 15:49:37,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:37,244 INFO L87 Difference]: Start difference. First operand 2378 states and 6593 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:37,551 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-05-21 15:49:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:49:37,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:37,554 INFO L225 Difference]: With dead ends: 3296 [2021-05-21 15:49:37,554 INFO L226 Difference]: Without dead ends: 3026 [2021-05-21 15:49:37,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:49:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-05-21 15:49:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-05-21 15:49:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.7805872756933114) internal successors, (6818), 2452 states have internal predecessors, (6818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-05-21 15:49:37,580 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-05-21 15:49:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:37,581 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-05-21 15:49:37,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-05-21 15:49:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:37,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:37,583 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:37,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:37,783 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:37,783 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-05-21 15:49:37,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:37,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714976787] [2021-05-21 15:49:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:37,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714976787] [2021-05-21 15:49:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714976787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:37,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614556837] [2021-05-21 15:49:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:37,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:49:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:38,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614556837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:38,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:38,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:49:38,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90085436] [2021-05-21 15:49:38,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:38,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:38,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:38,012 INFO L87 Difference]: Start difference. First operand 2453 states and 6818 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:38,271 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-05-21 15:49:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:49:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:38,275 INFO L225 Difference]: With dead ends: 3366 [2021-05-21 15:49:38,275 INFO L226 Difference]: Without dead ends: 3096 [2021-05-21 15:49:38,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:49:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-05-21 15:49:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-05-21 15:49:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7930352196280173) internal successors, (7058), 2527 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-05-21 15:49:38,302 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-05-21 15:49:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:38,302 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-05-21 15:49:38,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-05-21 15:49:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:38,304 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:38,304 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:38,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 15:49:38,504 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-05-21 15:49:38,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:38,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901612062] [2021-05-21 15:49:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:38,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901612062] [2021-05-21 15:49:38,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901612062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143345252] [2021-05-21 15:49:38,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:38,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:38,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:38,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:38,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143345252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:38,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:38,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:49:38,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675727135] [2021-05-21 15:49:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:38,787 INFO L87 Difference]: Start difference. First operand 2528 states and 7058 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:39,185 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-05-21 15:49:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:49:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:39,189 INFO L225 Difference]: With dead ends: 3944 [2021-05-21 15:49:39,189 INFO L226 Difference]: Without dead ends: 3321 [2021-05-21 15:49:39,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:49:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-05-21 15:49:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-05-21 15:49:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-05-21 15:49:39,215 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-05-21 15:49:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:39,215 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-05-21 15:49:39,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-05-21 15:49:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:39,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:39,217 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:39,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:39,417 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-05-21 15:49:39,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:39,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311708876] [2021-05-21 15:49:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:39,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:39,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311708876] [2021-05-21 15:49:39,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311708876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:39,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527164823] [2021-05-21 15:49:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:39,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:49:39,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:39,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527164823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:39,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:39,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:49:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622637074] [2021-05-21 15:49:39,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:39,636 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:39,929 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-05-21 15:49:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:49:39,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:39,933 INFO L225 Difference]: With dead ends: 4148 [2021-05-21 15:49:39,933 INFO L226 Difference]: Without dead ends: 3878 [2021-05-21 15:49:39,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:49:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-05-21 15:49:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-05-21 15:49:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-05-21 15:49:39,963 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-05-21 15:49:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:39,963 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-05-21 15:49:39,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-05-21 15:49:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:49:39,965 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:39,965 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:40,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-21 15:49:40,166 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-05-21 15:49:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:40,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569901024] [2021-05-21 15:49:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:40,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569901024] [2021-05-21 15:49:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569901024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109697548] [2021-05-21 15:49:40,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:40,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:49:40,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:40,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:49:40,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:40,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109697548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:40,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:40,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:49:40,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981147934] [2021-05-21 15:49:40,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:40,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:40,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:40,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:40,377 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:40,812 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-05-21 15:49:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:49:40,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:49:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:40,816 INFO L225 Difference]: With dead ends: 4016 [2021-05-21 15:49:40,816 INFO L226 Difference]: Without dead ends: 3441 [2021-05-21 15:49:40,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:49:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-05-21 15:49:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-05-21 15:49:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-05-21 15:49:40,836 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-05-21 15:49:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:40,836 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-05-21 15:49:40,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-05-21 15:49:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:40,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:40,838 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:41,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:41,038 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:41,039 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-05-21 15:49:41,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:41,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703396546] [2021-05-21 15:49:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:41,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703396546] [2021-05-21 15:49:41,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703396546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481807735] [2021-05-21 15:49:41,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:41,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:41,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481807735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:41,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:41,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-05-21 15:49:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153767758] [2021-05-21 15:49:41,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:49:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:41,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:49:41,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:49:41,315 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:41,544 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-05-21 15:49:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:41,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:41,547 INFO L225 Difference]: With dead ends: 2864 [2021-05-21 15:49:41,547 INFO L226 Difference]: Without dead ends: 2530 [2021-05-21 15:49:41,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-05-21 15:49:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-05-21 15:49:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-05-21 15:49:41,566 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-05-21 15:49:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:41,566 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-05-21 15:49:41,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-05-21 15:49:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:41,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:41,567 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:41,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-21 15:49:41,768 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-05-21 15:49:41,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:41,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301404313] [2021-05-21 15:49:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:41,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:41,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301404313] [2021-05-21 15:49:41,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301404313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:41,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451797696] [2021-05-21 15:49:41,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:41,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:41,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451797696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:42,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:42,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-21 15:49:42,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965399097] [2021-05-21 15:49:42,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:42,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:42,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:42,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:42,001 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:42,172 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-05-21 15:49:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:49:42,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:42,175 INFO L225 Difference]: With dead ends: 3386 [2021-05-21 15:49:42,175 INFO L226 Difference]: Without dead ends: 3116 [2021-05-21 15:49:42,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:49:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-05-21 15:49:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-05-21 15:49:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-05-21 15:49:42,196 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-05-21 15:49:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:42,196 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-05-21 15:49:42,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-05-21 15:49:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:42,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:42,198 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:42,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-05-21 15:49:42,398 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-05-21 15:49:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:42,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816227628] [2021-05-21 15:49:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:42,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816227628] [2021-05-21 15:49:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816227628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068909503] [2021-05-21 15:49:42,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:42,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:49:42,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068909503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:42,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:42,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:49:42,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754186274] [2021-05-21 15:49:42,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:42,697 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:42,935 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-05-21 15:49:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:42,938 INFO L225 Difference]: With dead ends: 3346 [2021-05-21 15:49:42,938 INFO L226 Difference]: Without dead ends: 3076 [2021-05-21 15:49:42,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:49:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-05-21 15:49:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-05-21 15:49:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-05-21 15:49:42,960 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-05-21 15:49:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:42,960 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-05-21 15:49:42,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-05-21 15:49:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:42,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:42,962 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:43,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:43,177 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-05-21 15:49:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:43,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15879918] [2021-05-21 15:49:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:43,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:43,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15879918] [2021-05-21 15:49:43,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15879918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:43,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338132407] [2021-05-21 15:49:43,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:43,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:43,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:43,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338132407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:43,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:43,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-21 15:49:43,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377956728] [2021-05-21 15:49:43,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:43,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:43,409 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:43,615 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-05-21 15:49:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:49:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:43,618 INFO L225 Difference]: With dead ends: 3396 [2021-05-21 15:49:43,618 INFO L226 Difference]: Without dead ends: 3126 [2021-05-21 15:49:43,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:49:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-05-21 15:49:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-05-21 15:49:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-05-21 15:49:43,640 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-05-21 15:49:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:43,641 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-05-21 15:49:43,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-05-21 15:49:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:43,642 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:43,643 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:43,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:43,845 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-05-21 15:49:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:43,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466657210] [2021-05-21 15:49:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:43,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466657210] [2021-05-21 15:49:43,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466657210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650773985] [2021-05-21 15:49:43,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:43,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:49:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:44,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650773985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:44,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:44,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:49:44,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584255519] [2021-05-21 15:49:44,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:44,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:44,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:44,084 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:44,397 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-05-21 15:49:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:49:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:44,400 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 15:49:44,400 INFO L226 Difference]: Without dead ends: 3151 [2021-05-21 15:49:44,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-05-21 15:49:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-05-21 15:49:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-05-21 15:49:44,423 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-05-21 15:49:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:44,423 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-05-21 15:49:44,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-05-21 15:49:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:44,425 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:44,425 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:44,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-21 15:49:44,633 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-05-21 15:49:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:44,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728063092] [2021-05-21 15:49:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:44,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728063092] [2021-05-21 15:49:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728063092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369131727] [2021-05-21 15:49:44,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:44,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:49:44,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:44,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:44,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369131727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:44,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:44,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-21 15:49:44,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490093203] [2021-05-21 15:49:44,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:44,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:44,888 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:45,133 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-05-21 15:49:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:49:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:45,137 INFO L225 Difference]: With dead ends: 3446 [2021-05-21 15:49:45,137 INFO L226 Difference]: Without dead ends: 3176 [2021-05-21 15:49:45,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:49:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-05-21 15:49:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-05-21 15:49:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-05-21 15:49:45,162 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-05-21 15:49:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:45,162 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-05-21 15:49:45,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-05-21 15:49:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:45,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:45,164 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:45,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:45,365 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-05-21 15:49:45,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:45,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000465949] [2021-05-21 15:49:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:45,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000465949] [2021-05-21 15:49:45,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000465949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584089815] [2021-05-21 15:49:45,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:45,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:45,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584089815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:45,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:45,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:49:45,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541383285] [2021-05-21 15:49:45,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:45,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:45,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:45,600 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:45,919 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-05-21 15:49:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:49:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:45,922 INFO L225 Difference]: With dead ends: 3471 [2021-05-21 15:49:45,923 INFO L226 Difference]: Without dead ends: 3201 [2021-05-21 15:49:45,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:49:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-05-21 15:49:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-05-21 15:49:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-05-21 15:49:45,949 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-05-21 15:49:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:45,949 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-05-21 15:49:45,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-05-21 15:49:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:45,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:45,957 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:46,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-21 15:49:46,165 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-05-21 15:49:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:46,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887734565] [2021-05-21 15:49:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:46,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887734565] [2021-05-21 15:49:46,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887734565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294561470] [2021-05-21 15:49:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:46,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:46,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:46,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294561470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:46,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:46,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-21 15:49:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954447470] [2021-05-21 15:49:46,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:46,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:46,388 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:46,711 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-05-21 15:49:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:49:46,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:46,715 INFO L225 Difference]: With dead ends: 3496 [2021-05-21 15:49:46,715 INFO L226 Difference]: Without dead ends: 3226 [2021-05-21 15:49:46,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:49:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-05-21 15:49:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-05-21 15:49:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-05-21 15:49:46,742 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-05-21 15:49:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:46,742 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-05-21 15:49:46,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-05-21 15:49:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:46,744 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:46,744 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:46,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:46,945 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-05-21 15:49:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:46,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686312989] [2021-05-21 15:49:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:47,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:47,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686312989] [2021-05-21 15:49:47,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686312989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:47,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591700935] [2021-05-21 15:49:47,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:47,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:49:47,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591700935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:47,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:47,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:49:47,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347240160] [2021-05-21 15:49:47,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:47,179 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:47,529 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-05-21 15:49:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:49:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:47,532 INFO L225 Difference]: With dead ends: 3521 [2021-05-21 15:49:47,532 INFO L226 Difference]: Without dead ends: 3251 [2021-05-21 15:49:47,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:49:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-05-21 15:49:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-05-21 15:49:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-05-21 15:49:47,559 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-05-21 15:49:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:47,560 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-05-21 15:49:47,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-05-21 15:49:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:47,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:47,562 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:47,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-21 15:49:47,762 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:47,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-05-21 15:49:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:47,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211983198] [2021-05-21 15:49:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:47,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:47,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211983198] [2021-05-21 15:49:47,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211983198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:47,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599927551] [2021-05-21 15:49:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:47,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:47,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:47,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:47,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:47,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599927551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:47,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:47,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-21 15:49:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720603554] [2021-05-21 15:49:47,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:47,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:47,965 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:48,264 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-05-21 15:49:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:49:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:48,267 INFO L225 Difference]: With dead ends: 3591 [2021-05-21 15:49:48,267 INFO L226 Difference]: Without dead ends: 3321 [2021-05-21 15:49:48,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:49:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-05-21 15:49:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-05-21 15:49:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-05-21 15:49:48,295 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-05-21 15:49:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:48,295 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-05-21 15:49:48,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-05-21 15:49:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:48,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:48,297 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:48,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:48,498 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-05-21 15:49:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:48,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701427435] [2021-05-21 15:49:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:48,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:48,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701427435] [2021-05-21 15:49:48,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701427435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:48,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986997979] [2021-05-21 15:49:48,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:48,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:49:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:48,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986997979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:48,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:48,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:49:48,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088848253] [2021-05-21 15:49:48,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:48,739 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:49,160 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-05-21 15:49:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:49:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:49,164 INFO L225 Difference]: With dead ends: 4169 [2021-05-21 15:49:49,164 INFO L226 Difference]: Without dead ends: 3546 [2021-05-21 15:49:49,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:49:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-05-21 15:49:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-05-21 15:49:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-05-21 15:49:49,192 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-05-21 15:49:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:49,192 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-05-21 15:49:49,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-05-21 15:49:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:49,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:49,194 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:49,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-21 15:49:49,395 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-05-21 15:49:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:49,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184478879] [2021-05-21 15:49:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:49,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184478879] [2021-05-21 15:49:49,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184478879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669078506] [2021-05-21 15:49:49,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:49,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:49:49,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:49,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:49,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669078506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:49,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:49,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-05-21 15:49:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325812273] [2021-05-21 15:49:49,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:49:49,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:49:49,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:49:49,595 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:49,904 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-05-21 15:49:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:49:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:49,907 INFO L225 Difference]: With dead ends: 4398 [2021-05-21 15:49:49,908 INFO L226 Difference]: Without dead ends: 4128 [2021-05-21 15:49:49,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:49:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-05-21 15:49:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-05-21 15:49:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-05-21 15:49:49,936 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-05-21 15:49:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:49,936 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-05-21 15:49:49,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-05-21 15:49:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:49:49,938 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:49,938 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:50,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:50,139 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-05-21 15:49:50,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:50,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038441791] [2021-05-21 15:49:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:50,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038441791] [2021-05-21 15:49:50,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038441791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015307580] [2021-05-21 15:49:50,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:49:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:50,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015307580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:50,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:50,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:49:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286691467] [2021-05-21 15:49:50,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:50,350 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:50,777 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-05-21 15:49:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:49:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:49:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:50,781 INFO L225 Difference]: With dead ends: 3885 [2021-05-21 15:49:50,781 INFO L226 Difference]: Without dead ends: 3306 [2021-05-21 15:49:50,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:49:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-05-21 15:49:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-05-21 15:49:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-05-21 15:49:50,802 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-05-21 15:49:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:50,802 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-05-21 15:49:50,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-05-21 15:49:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:50,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:50,804 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:51,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:51,004 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-05-21 15:49:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:51,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323205450] [2021-05-21 15:49:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:51,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323205450] [2021-05-21 15:49:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323205450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992712340] [2021-05-21 15:49:51,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:51,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:51,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992712340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:51,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:51,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:49:51,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247013242] [2021-05-21 15:49:51,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:51,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:51,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:51,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:51,267 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:51,500 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-05-21 15:49:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:49:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:51,503 INFO L225 Difference]: With dead ends: 3131 [2021-05-21 15:49:51,503 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 15:49:51,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:49:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 15:49:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-05-21 15:49:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-05-21 15:49:51,524 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-05-21 15:49:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:51,524 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-05-21 15:49:51,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-05-21 15:49:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:51,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:51,525 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:51,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:51,726 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-05-21 15:49:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:51,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166675637] [2021-05-21 15:49:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:51,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166675637] [2021-05-21 15:49:51,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166675637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277884446] [2021-05-21 15:49:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:51,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:49:51,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:52,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277884446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:52,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:52,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:49:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511269365] [2021-05-21 15:49:52,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:49:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:49:52,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:49:52,036 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:52,281 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-05-21 15:49:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:49:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:52,285 INFO L225 Difference]: With dead ends: 3451 [2021-05-21 15:49:52,285 INFO L226 Difference]: Without dead ends: 3181 [2021-05-21 15:49:52,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:49:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-05-21 15:49:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-05-21 15:49:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-05-21 15:49:52,307 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-05-21 15:49:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:52,307 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-05-21 15:49:52,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-05-21 15:49:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:52,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:52,309 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:52,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:52,509 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-05-21 15:49:52,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:52,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068671416] [2021-05-21 15:49:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:52,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:52,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068671416] [2021-05-21 15:49:52,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068671416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:52,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343075695] [2021-05-21 15:49:52,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:52,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:52,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:52,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343075695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:52,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:52,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:49:52,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275523650] [2021-05-21 15:49:52,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:52,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:52,745 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:52,995 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-05-21 15:49:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:49:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:52,998 INFO L225 Difference]: With dead ends: 3481 [2021-05-21 15:49:52,998 INFO L226 Difference]: Without dead ends: 3211 [2021-05-21 15:49:52,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:49:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-05-21 15:49:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-05-21 15:49:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-05-21 15:49:53,021 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-05-21 15:49:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:53,022 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-05-21 15:49:53,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-05-21 15:49:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:53,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:53,023 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:53,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:53,224 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:53,224 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-05-21 15:49:53,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:53,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859262883] [2021-05-21 15:49:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859262883] [2021-05-21 15:49:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859262883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854389090] [2021-05-21 15:49:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:53,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:49:53,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854389090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:53,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:53,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:49:53,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503482252] [2021-05-21 15:49:53,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:49:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:49:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:49:53,475 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:53,779 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-05-21 15:49:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:49:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:53,782 INFO L225 Difference]: With dead ends: 3506 [2021-05-21 15:49:53,782 INFO L226 Difference]: Without dead ends: 3236 [2021-05-21 15:49:53,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:49:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-05-21 15:49:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-05-21 15:49:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-05-21 15:49:53,806 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-05-21 15:49:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:53,806 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-05-21 15:49:53,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-05-21 15:49:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:53,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:53,808 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:54,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:54,009 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:54,009 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-05-21 15:49:54,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:54,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570807864] [2021-05-21 15:49:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:54,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570807864] [2021-05-21 15:49:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570807864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:54,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292286379] [2021-05-21 15:49:54,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:54,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:49:54,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:54,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:54,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292286379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:54,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:54,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:49:54,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071491778] [2021-05-21 15:49:54,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:54,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:54,259 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:54,538 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-05-21 15:49:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:49:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:54,541 INFO L225 Difference]: With dead ends: 3531 [2021-05-21 15:49:54,542 INFO L226 Difference]: Without dead ends: 3261 [2021-05-21 15:49:54,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:49:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-05-21 15:49:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-05-21 15:49:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-05-21 15:49:54,566 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-05-21 15:49:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:54,566 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-05-21 15:49:54,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-05-21 15:49:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:54,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:54,568 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:54,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:54,768 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-05-21 15:49:54,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:54,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950353631] [2021-05-21 15:49:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:54,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950353631] [2021-05-21 15:49:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950353631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660690775] [2021-05-21 15:49:54,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660690775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:55,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:55,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:49:55,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210018329] [2021-05-21 15:49:55,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:49:55,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:55,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:49:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:49:55,044 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:55,398 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-05-21 15:49:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:49:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:55,401 INFO L225 Difference]: With dead ends: 3556 [2021-05-21 15:49:55,401 INFO L226 Difference]: Without dead ends: 3286 [2021-05-21 15:49:55,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:49:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-05-21 15:49:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-05-21 15:49:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-05-21 15:49:55,425 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-05-21 15:49:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:55,425 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-05-21 15:49:55,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-05-21 15:49:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:55,427 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:55,427 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:55,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-21 15:49:55,628 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-05-21 15:49:55,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:55,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320643810] [2021-05-21 15:49:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:55,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:55,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320643810] [2021-05-21 15:49:55,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320643810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:55,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114546777] [2021-05-21 15:49:55,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:55,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:49:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114546777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:55,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:55,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:49:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465070127] [2021-05-21 15:49:55,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:55,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:55,864 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:56,158 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-05-21 15:49:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:49:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:56,161 INFO L225 Difference]: With dead ends: 3581 [2021-05-21 15:49:56,161 INFO L226 Difference]: Without dead ends: 3311 [2021-05-21 15:49:56,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:49:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-05-21 15:49:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-05-21 15:49:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-05-21 15:49:56,188 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-05-21 15:49:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:56,188 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-05-21 15:49:56,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-05-21 15:49:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:56,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:56,190 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:56,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:56,390 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-05-21 15:49:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:56,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782896849] [2021-05-21 15:49:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:56,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782896849] [2021-05-21 15:49:56,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782896849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942095312] [2021-05-21 15:49:56,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:56,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:49:56,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:56,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942095312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:56,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:56,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:49:56,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015768093] [2021-05-21 15:49:56,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:49:56,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:56,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:49:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:49:56,653 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:57,036 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-05-21 15:49:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:49:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:57,040 INFO L225 Difference]: With dead ends: 3606 [2021-05-21 15:49:57,040 INFO L226 Difference]: Without dead ends: 3336 [2021-05-21 15:49:57,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:49:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-05-21 15:49:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-05-21 15:49:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-05-21 15:49:57,083 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-05-21 15:49:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:57,083 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-05-21 15:49:57,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-05-21 15:49:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:57,085 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:57,085 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:57,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 15:49:57,286 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-05-21 15:49:57,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:57,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613973831] [2021-05-21 15:49:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:57,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:57,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613973831] [2021-05-21 15:49:57,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613973831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:57,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179596874] [2021-05-21 15:49:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:57,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:49:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:57,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179596874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:57,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:57,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:49:57,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42111164] [2021-05-21 15:49:57,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:57,510 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:57,831 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-05-21 15:49:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:49:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:57,835 INFO L225 Difference]: With dead ends: 3631 [2021-05-21 15:49:57,835 INFO L226 Difference]: Without dead ends: 3361 [2021-05-21 15:49:57,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:49:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-05-21 15:49:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-05-21 15:49:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-05-21 15:49:57,865 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-05-21 15:49:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:57,866 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-05-21 15:49:57,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-05-21 15:49:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:57,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:57,868 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:58,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:58,068 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-05-21 15:49:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178097334] [2021-05-21 15:49:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:58,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:58,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178097334] [2021-05-21 15:49:58,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178097334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:58,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499534550] [2021-05-21 15:49:58,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:58,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:49:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:58,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499534550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:58,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:58,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:49:58,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641673112] [2021-05-21 15:49:58,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:49:58,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:58,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:49:58,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:49:58,302 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:58,725 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-05-21 15:49:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:49:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:58,729 INFO L225 Difference]: With dead ends: 3716 [2021-05-21 15:49:58,729 INFO L226 Difference]: Without dead ends: 3446 [2021-05-21 15:49:58,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:49:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-05-21 15:49:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-05-21 15:49:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-05-21 15:49:58,758 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-05-21 15:49:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:58,758 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-05-21 15:49:58,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-05-21 15:49:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:58,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:58,760 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:58,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:58,960 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-05-21 15:49:58,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:58,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553757866] [2021-05-21 15:49:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:59,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:59,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553757866] [2021-05-21 15:49:59,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553757866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:59,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359446992] [2021-05-21 15:49:59,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:59,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:49:59,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:49:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:49:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:59,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359446992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:59,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:49:59,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:49:59,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181150310] [2021-05-21 15:49:59,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:49:59,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:49:59,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:49:59,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:49:59,216 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:49:59,553 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-05-21 15:49:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:49:59,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:49:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:49:59,557 INFO L225 Difference]: With dead ends: 4458 [2021-05-21 15:49:59,557 INFO L226 Difference]: Without dead ends: 4188 [2021-05-21 15:49:59,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:49:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-05-21 15:49:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-05-21 15:49:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-05-21 15:49:59,588 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-05-21 15:49:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:49:59,588 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-05-21 15:49:59,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:49:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-05-21 15:49:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:49:59,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:49:59,590 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:49:59,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:59,790 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:49:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:49:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-05-21 15:49:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:49:59,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479181881] [2021-05-21 15:49:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:49:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:49:59,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:49:59,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479181881] [2021-05-21 15:49:59,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479181881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:49:59,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124102671] [2021-05-21 15:49:59,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:49:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:49:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:49:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:00,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124102671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:00,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:00,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:50:00,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978135267] [2021-05-21 15:50:00,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:00,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:00,025 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:00,453 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-05-21 15:50:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:50:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:50:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:00,456 INFO L225 Difference]: With dead ends: 3920 [2021-05-21 15:50:00,456 INFO L226 Difference]: Without dead ends: 3431 [2021-05-21 15:50:00,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:50:00,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-05-21 15:50:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-05-21 15:50:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-05-21 15:50:00,477 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-05-21 15:50:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:00,477 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-05-21 15:50:00,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-05-21 15:50:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:00,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:00,479 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:00,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:00,679 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-05-21 15:50:00,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:00,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410064930] [2021-05-21 15:50:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:00,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410064930] [2021-05-21 15:50:00,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410064930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:00,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131597551] [2021-05-21 15:50:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:00,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:00,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:00,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131597551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:00,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:00,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:00,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34013734] [2021-05-21 15:50:00,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:00,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:00,984 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:01,252 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-05-21 15:50:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:50:01,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:01,255 INFO L225 Difference]: With dead ends: 3024 [2021-05-21 15:50:01,255 INFO L226 Difference]: Without dead ends: 2690 [2021-05-21 15:50:01,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:50:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-05-21 15:50:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-05-21 15:50:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-05-21 15:50:01,274 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-05-21 15:50:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-05-21 15:50:01,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-05-21 15:50:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:01,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:01,276 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:01,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:01,476 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-05-21 15:50:01,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:01,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340191269] [2021-05-21 15:50:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:01,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340191269] [2021-05-21 15:50:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340191269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218909900] [2021-05-21 15:50:01,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:01,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:50:01,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:01,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:01,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218909900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:01,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:01,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:01,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465018744] [2021-05-21 15:50:01,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:01,752 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:01,971 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-05-21 15:50:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:50:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:01,975 INFO L225 Difference]: With dead ends: 3646 [2021-05-21 15:50:01,975 INFO L226 Difference]: Without dead ends: 3376 [2021-05-21 15:50:01,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:50:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-05-21 15:50:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-05-21 15:50:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-05-21 15:50:01,997 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-05-21 15:50:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:01,997 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-05-21 15:50:01,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-05-21 15:50:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:01,999 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:01,999 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:02,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:02,207 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-05-21 15:50:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:02,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040381744] [2021-05-21 15:50:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:02,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040381744] [2021-05-21 15:50:02,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040381744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142054858] [2021-05-21 15:50:02,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:02,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:02,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142054858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:02,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:02,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:50:02,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045243700] [2021-05-21 15:50:02,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:50:02,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:02,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:50:02,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:50:02,541 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:02,816 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-05-21 15:50:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:50:02,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:02,820 INFO L225 Difference]: With dead ends: 3606 [2021-05-21 15:50:02,820 INFO L226 Difference]: Without dead ends: 3336 [2021-05-21 15:50:02,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:50:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-05-21 15:50:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-05-21 15:50:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-05-21 15:50:02,847 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-05-21 15:50:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:02,847 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-05-21 15:50:02,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-05-21 15:50:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:02,849 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:02,849 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:03,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-21 15:50:03,050 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:03,050 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-05-21 15:50:03,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:03,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691222950] [2021-05-21 15:50:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:03,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691222950] [2021-05-21 15:50:03,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691222950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047024679] [2021-05-21 15:50:03,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:03,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:50:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:03,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047024679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:03,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:03,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:03,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122053182] [2021-05-21 15:50:03,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:03,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:03,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:03,330 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:03,569 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-05-21 15:50:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:50:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:03,572 INFO L225 Difference]: With dead ends: 3656 [2021-05-21 15:50:03,572 INFO L226 Difference]: Without dead ends: 3386 [2021-05-21 15:50:03,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:50:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-05-21 15:50:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-05-21 15:50:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-05-21 15:50:03,598 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-05-21 15:50:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:03,598 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-05-21 15:50:03,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-05-21 15:50:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:03,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:03,600 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:03,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:03,801 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-05-21 15:50:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:03,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441295480] [2021-05-21 15:50:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:03,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:03,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441295480] [2021-05-21 15:50:03,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441295480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:03,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329896237] [2021-05-21 15:50:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:04,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:50:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329896237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:04,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:04,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:50:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502984266] [2021-05-21 15:50:04,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:50:04,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:50:04,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:50:04,168 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:04,518 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-05-21 15:50:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:50:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:04,521 INFO L225 Difference]: With dead ends: 3681 [2021-05-21 15:50:04,521 INFO L226 Difference]: Without dead ends: 3411 [2021-05-21 15:50:04,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:50:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-05-21 15:50:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-05-21 15:50:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-05-21 15:50:04,547 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-05-21 15:50:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:04,547 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-05-21 15:50:04,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-05-21 15:50:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:04,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:04,549 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:04,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-21 15:50:04,750 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-05-21 15:50:04,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:04,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923624289] [2021-05-21 15:50:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:04,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:04,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923624289] [2021-05-21 15:50:04,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923624289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:04,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423397062] [2021-05-21 15:50:04,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:05,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423397062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:05,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:05,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:05,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670090711] [2021-05-21 15:50:05,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:05,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:05,042 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:05,346 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-05-21 15:50:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:50:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:05,350 INFO L225 Difference]: With dead ends: 3706 [2021-05-21 15:50:05,350 INFO L226 Difference]: Without dead ends: 3436 [2021-05-21 15:50:05,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:50:05,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-05-21 15:50:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-05-21 15:50:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-05-21 15:50:05,379 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-05-21 15:50:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:05,379 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-05-21 15:50:05,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-05-21 15:50:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:05,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:05,381 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:05,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:05,581 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-05-21 15:50:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:05,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568735471] [2021-05-21 15:50:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:05,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:05,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568735471] [2021-05-21 15:50:05,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568735471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002642705] [2021-05-21 15:50:05,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:05,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:05,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:05,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002642705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:05,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:05,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:50:05,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253000826] [2021-05-21 15:50:05,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:50:05,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:50:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:50:05,867 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:06,241 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-05-21 15:50:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:50:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:06,245 INFO L225 Difference]: With dead ends: 3731 [2021-05-21 15:50:06,245 INFO L226 Difference]: Without dead ends: 3461 [2021-05-21 15:50:06,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:50:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-05-21 15:50:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-05-21 15:50:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-05-21 15:50:06,285 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-05-21 15:50:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:06,285 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-05-21 15:50:06,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-05-21 15:50:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:06,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:06,287 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:06,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-21 15:50:06,489 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-05-21 15:50:06,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:06,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645548707] [2021-05-21 15:50:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:06,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:06,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645548707] [2021-05-21 15:50:06,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645548707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:06,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730308182] [2021-05-21 15:50:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:06,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:50:06,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:06,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730308182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:06,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:06,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:06,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742302077] [2021-05-21 15:50:06,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:06,812 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:07,137 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-05-21 15:50:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:50:07,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:07,145 INFO L225 Difference]: With dead ends: 3756 [2021-05-21 15:50:07,145 INFO L226 Difference]: Without dead ends: 3486 [2021-05-21 15:50:07,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:50:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-05-21 15:50:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-05-21 15:50:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-05-21 15:50:07,183 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-05-21 15:50:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:07,183 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-05-21 15:50:07,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-05-21 15:50:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:07,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:07,185 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:07,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 15:50:07,402 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-05-21 15:50:07,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:07,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197274696] [2021-05-21 15:50:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:07,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:07,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197274696] [2021-05-21 15:50:07,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197274696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:07,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530253307] [2021-05-21 15:50:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:07,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:07,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:07,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530253307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:07,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:07,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:50:07,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301591043] [2021-05-21 15:50:07,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:50:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:50:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:50:07,698 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:08,098 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-05-21 15:50:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:50:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:08,102 INFO L225 Difference]: With dead ends: 3781 [2021-05-21 15:50:08,102 INFO L226 Difference]: Without dead ends: 3511 [2021-05-21 15:50:08,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:50:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-05-21 15:50:08,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-05-21 15:50:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-05-21 15:50:08,134 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-05-21 15:50:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:08,134 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-05-21 15:50:08,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-05-21 15:50:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:08,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:08,136 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:08,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 15:50:08,345 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-05-21 15:50:08,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:08,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587065531] [2021-05-21 15:50:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:08,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:08,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587065531] [2021-05-21 15:50:08,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587065531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:08,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362431092] [2021-05-21 15:50:08,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:08,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:50:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:08,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:08,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:08,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362431092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:08,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:08,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:08,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543841428] [2021-05-21 15:50:08,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:08,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:08,639 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:08,977 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-05-21 15:50:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:50:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:08,981 INFO L225 Difference]: With dead ends: 3806 [2021-05-21 15:50:08,981 INFO L226 Difference]: Without dead ends: 3536 [2021-05-21 15:50:08,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:50:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-05-21 15:50:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-05-21 15:50:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-05-21 15:50:09,017 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-05-21 15:50:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:09,018 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-05-21 15:50:09,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-05-21 15:50:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:09,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:09,020 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:09,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:09,220 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-05-21 15:50:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:09,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527816794] [2021-05-21 15:50:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:09,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:09,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527816794] [2021-05-21 15:50:09,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527816794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:09,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279559775] [2021-05-21 15:50:09,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:09,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:50:09,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279559775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:09,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:50:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931353162] [2021-05-21 15:50:09,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:50:09,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:09,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:50:09,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:50:09,518 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:10,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:10,005 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-05-21 15:50:10,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:50:10,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:10,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:10,009 INFO L225 Difference]: With dead ends: 3831 [2021-05-21 15:50:10,009 INFO L226 Difference]: Without dead ends: 3561 [2021-05-21 15:50:10,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:50:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-05-21 15:50:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-05-21 15:50:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-05-21 15:50:10,044 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-05-21 15:50:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:10,045 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-05-21 15:50:10,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-05-21 15:50:10,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:10,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:10,047 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:10,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-21 15:50:10,261 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-05-21 15:50:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:10,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280068613] [2021-05-21 15:50:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:10,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280068613] [2021-05-21 15:50:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280068613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:10,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113909469] [2021-05-21 15:50:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:10,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113909469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:10,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:10,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001605797] [2021-05-21 15:50:10,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:10,530 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:10,885 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-05-21 15:50:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:50:10,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:10,889 INFO L225 Difference]: With dead ends: 3856 [2021-05-21 15:50:10,889 INFO L226 Difference]: Without dead ends: 3586 [2021-05-21 15:50:10,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:50:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-05-21 15:50:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-05-21 15:50:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-05-21 15:50:10,928 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-05-21 15:50:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:10,928 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-05-21 15:50:10,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-05-21 15:50:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:10,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:10,934 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:11,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:11,145 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-05-21 15:50:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:11,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376327978] [2021-05-21 15:50:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:11,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:11,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376327978] [2021-05-21 15:50:11,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376327978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:11,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041102916] [2021-05-21 15:50:11,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:11,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:11,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:11,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041102916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:11,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:11,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:50:11,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209968135] [2021-05-21 15:50:11,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:50:11,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:50:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:50:11,472 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:11,980 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-05-21 15:50:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:50:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:11,984 INFO L225 Difference]: With dead ends: 3941 [2021-05-21 15:50:11,984 INFO L226 Difference]: Without dead ends: 3671 [2021-05-21 15:50:11,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:50:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-05-21 15:50:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-05-21 15:50:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-05-21 15:50:12,038 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-05-21 15:50:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:12,038 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-05-21 15:50:12,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-05-21 15:50:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:12,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:12,041 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:12,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-21 15:50:12,245 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-05-21 15:50:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:12,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311336903] [2021-05-21 15:50:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:12,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:12,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311336903] [2021-05-21 15:50:12,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311336903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:12,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653339510] [2021-05-21 15:50:12,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:12,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:50:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:12,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:12,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653339510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:12,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:12,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:50:12,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714277913] [2021-05-21 15:50:12,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:50:12,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:50:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:50:12,574 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:12,969 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-05-21 15:50:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:50:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:12,974 INFO L225 Difference]: With dead ends: 4708 [2021-05-21 15:50:12,974 INFO L226 Difference]: Without dead ends: 4438 [2021-05-21 15:50:12,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:50:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-05-21 15:50:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-05-21 15:50:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-05-21 15:50:13,013 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-05-21 15:50:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:13,013 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-05-21 15:50:13,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-05-21 15:50:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:50:13,015 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:13,015 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:13,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:13,216 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-05-21 15:50:13,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:13,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979541285] [2021-05-21 15:50:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:13,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979541285] [2021-05-21 15:50:13,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979541285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531880267] [2021-05-21 15:50:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:13,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:50:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:13,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531880267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:13,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:13,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-05-21 15:50:13,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282280593] [2021-05-21 15:50:13,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:13,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:13,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:13,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:13,472 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:14,070 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-05-21 15:50:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:50:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:50:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:14,074 INFO L225 Difference]: With dead ends: 4651 [2021-05-21 15:50:14,074 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:50:14,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:50:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:50:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-05-21 15:50:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:14,107 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-05-21 15:50:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:14,107 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:14,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:14,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:14,109 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:14,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:14,310 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-05-21 15:50:14,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:14,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567193212] [2021-05-21 15:50:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:14,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:14,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567193212] [2021-05-21 15:50:14,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567193212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:14,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720607967] [2021-05-21 15:50:14,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:14,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:50:14,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:14,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720607967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:14,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:14,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:14,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709210782] [2021-05-21 15:50:14,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:14,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:14,614 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:14,900 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-05-21 15:50:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:50:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:14,904 INFO L225 Difference]: With dead ends: 4346 [2021-05-21 15:50:14,905 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:50:14,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:50:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:50:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-05-21 15:50:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:14,939 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:14,939 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:14,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:14,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:14,942 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:15,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-21 15:50:15,142 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-05-21 15:50:15,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:15,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049143405] [2021-05-21 15:50:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:15,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:15,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049143405] [2021-05-21 15:50:15,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049143405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:15,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453171144] [2021-05-21 15:50:15,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:15,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:50:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:15,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453171144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:15,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:15,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:15,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422325451] [2021-05-21 15:50:15,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:15,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:15,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:15,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:15,477 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:15,801 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-05-21 15:50:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:50:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:15,805 INFO L225 Difference]: With dead ends: 4641 [2021-05-21 15:50:15,805 INFO L226 Difference]: Without dead ends: 4371 [2021-05-21 15:50:15,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:50:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-05-21 15:50:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-05-21 15:50:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:15,838 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:15,839 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:15,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:15,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:15,841 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:16,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:16,042 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:16,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-05-21 15:50:16,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:16,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342227763] [2021-05-21 15:50:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:16,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:16,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342227763] [2021-05-21 15:50:16,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342227763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723878269] [2021-05-21 15:50:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:16,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723878269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:16,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:16,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:16,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094737442] [2021-05-21 15:50:16,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:16,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:16,345 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:16,637 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-05-21 15:50:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:50:16,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:16,642 INFO L225 Difference]: With dead ends: 4596 [2021-05-21 15:50:16,642 INFO L226 Difference]: Without dead ends: 4326 [2021-05-21 15:50:16,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:50:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-05-21 15:50:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-05-21 15:50:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:16,679 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:16,680 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:16,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:16,682 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:16,682 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:16,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:16,883 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-05-21 15:50:16,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:16,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603307282] [2021-05-21 15:50:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:17,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:17,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603307282] [2021-05-21 15:50:17,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603307282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:17,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969063813] [2021-05-21 15:50:17,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:17,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:17,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:17,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969063813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:17,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:17,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:17,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469235270] [2021-05-21 15:50:17,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:17,189 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:17,568 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-05-21 15:50:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:50:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:17,572 INFO L225 Difference]: With dead ends: 4546 [2021-05-21 15:50:17,572 INFO L226 Difference]: Without dead ends: 4276 [2021-05-21 15:50:17,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:50:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-05-21 15:50:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-05-21 15:50:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:17,607 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:17,607 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:17,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:17,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:17,610 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:17,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 15:50:17,826 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-05-21 15:50:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:17,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867692913] [2021-05-21 15:50:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:17,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867692913] [2021-05-21 15:50:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867692913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020132989] [2021-05-21 15:50:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:18,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:50:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:18,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020132989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:18,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:18,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297036153] [2021-05-21 15:50:18,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:18,115 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:18,439 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-05-21 15:50:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:50:18,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:18,444 INFO L225 Difference]: With dead ends: 4496 [2021-05-21 15:50:18,444 INFO L226 Difference]: Without dead ends: 4226 [2021-05-21 15:50:18,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:50:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-21 15:50:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-05-21 15:50:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:18,481 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:18,481 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:18,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:18,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:18,484 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:18,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 15:50:18,684 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-05-21 15:50:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:18,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828362105] [2021-05-21 15:50:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:18,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828362105] [2021-05-21 15:50:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828362105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136621587] [2021-05-21 15:50:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:18,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:18,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:18,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:19,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136621587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:19,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:19,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:19,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776250772] [2021-05-21 15:50:19,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:19,039 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:19,443 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-05-21 15:50:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:50:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:19,447 INFO L225 Difference]: With dead ends: 4446 [2021-05-21 15:50:19,447 INFO L226 Difference]: Without dead ends: 4176 [2021-05-21 15:50:19,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:50:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-05-21 15:50:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-05-21 15:50:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:19,479 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:19,479 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:19,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:19,481 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:19,481 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:19,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 15:50:19,682 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-05-21 15:50:19,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:19,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548145185] [2021-05-21 15:50:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:19,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:19,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548145185] [2021-05-21 15:50:19,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548145185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:19,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128713873] [2021-05-21 15:50:19,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:19,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:50:19,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:19,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:19,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128713873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:19,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:19,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:19,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247246079] [2021-05-21 15:50:19,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:19,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:19,963 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:20,324 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-05-21 15:50:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:50:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:20,328 INFO L225 Difference]: With dead ends: 4396 [2021-05-21 15:50:20,328 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 15:50:20,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:50:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 15:50:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-05-21 15:50:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:20,359 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:20,359 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:20,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:20,361 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:20,361 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:20,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:20,562 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:20,563 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-05-21 15:50:20,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:20,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859493193] [2021-05-21 15:50:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:20,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859493193] [2021-05-21 15:50:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859493193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177876613] [2021-05-21 15:50:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:20,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:50:20,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:20,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:20,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177876613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:20,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:20,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:20,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597632847] [2021-05-21 15:50:20,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:20,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:20,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:20,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:20,858 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:21,370 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-05-21 15:50:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:50:21,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:21,374 INFO L225 Difference]: With dead ends: 4346 [2021-05-21 15:50:21,374 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:50:21,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:50:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:50:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-05-21 15:50:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:21,407 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:21,407 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:21,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:21,410 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:21,410 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:21,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-21 15:50:21,610 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-05-21 15:50:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:21,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113071495] [2021-05-21 15:50:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:21,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113071495] [2021-05-21 15:50:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113071495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647363288] [2021-05-21 15:50:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:21,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:21,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647363288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:21,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:21,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:21,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474931102] [2021-05-21 15:50:21,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:21,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:21,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:21,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:21,924 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:22,315 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-05-21 15:50:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:50:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:22,320 INFO L225 Difference]: With dead ends: 4296 [2021-05-21 15:50:22,320 INFO L226 Difference]: Without dead ends: 4026 [2021-05-21 15:50:22,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:50:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-05-21 15:50:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-05-21 15:50:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:22,353 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:22,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:22,355 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 15:50:22,556 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:22,556 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-05-21 15:50:22,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:22,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709695612] [2021-05-21 15:50:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:22,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:22,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709695612] [2021-05-21 15:50:22,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709695612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:22,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506440943] [2021-05-21 15:50:22,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:22,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:22,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:22,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506440943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:22,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:22,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:22,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745047566] [2021-05-21 15:50:22,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:22,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:22,836 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:23,339 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-05-21 15:50:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:50:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:23,343 INFO L225 Difference]: With dead ends: 4246 [2021-05-21 15:50:23,343 INFO L226 Difference]: Without dead ends: 3976 [2021-05-21 15:50:23,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:50:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-05-21 15:50:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-05-21 15:50:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:23,378 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:23,378 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:23,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:23,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:23,381 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:23,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 15:50:23,597 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-05-21 15:50:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:23,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557518989] [2021-05-21 15:50:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:23,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:23,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557518989] [2021-05-21 15:50:23,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557518989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:23,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697208175] [2021-05-21 15:50:23,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:23,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:50:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:23,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697208175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:23,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:23,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:23,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936684973] [2021-05-21 15:50:23,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:23,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:23,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:23,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:23,864 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:24,271 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-05-21 15:50:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:50:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:24,275 INFO L225 Difference]: With dead ends: 4196 [2021-05-21 15:50:24,275 INFO L226 Difference]: Without dead ends: 3926 [2021-05-21 15:50:24,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:50:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-05-21 15:50:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-05-21 15:50:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:50:24,309 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:50:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:24,309 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:50:24,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:50:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:24,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:24,311 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:24,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:24,512 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-05-21 15:50:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:24,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79789945] [2021-05-21 15:50:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:24,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79789945] [2021-05-21 15:50:24,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79789945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977054803] [2021-05-21 15:50:24,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:24,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:24,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977054803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:24,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:24,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:24,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669970001] [2021-05-21 15:50:24,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:24,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:24,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:24,806 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:25,338 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-05-21 15:50:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:50:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:25,342 INFO L225 Difference]: With dead ends: 4206 [2021-05-21 15:50:25,343 INFO L226 Difference]: Without dead ends: 3936 [2021-05-21 15:50:25,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:50:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-05-21 15:50:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-05-21 15:50:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-05-21 15:50:25,377 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-05-21 15:50:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:25,377 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-05-21 15:50:25,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-05-21 15:50:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:25,379 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:25,379 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:25,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:25,580 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-05-21 15:50:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:25,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041797638] [2021-05-21 15:50:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:25,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:25,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041797638] [2021-05-21 15:50:25,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041797638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:25,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207039212] [2021-05-21 15:50:25,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:25,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:50:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:25,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:25,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:25,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207039212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:25,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:25,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:50:25,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118780762] [2021-05-21 15:50:25,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:50:25,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:50:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:50:25,848 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:26,309 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-05-21 15:50:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:50:26,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:26,314 INFO L225 Difference]: With dead ends: 4948 [2021-05-21 15:50:26,315 INFO L226 Difference]: Without dead ends: 4678 [2021-05-21 15:50:26,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:50:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-05-21 15:50:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-05-21 15:50:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-05-21 15:50:26,356 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-05-21 15:50:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:26,356 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-05-21 15:50:26,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-05-21 15:50:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:50:26,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:26,358 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:26,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:26,559 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:26,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-05-21 15:50:26,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:26,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127206358] [2021-05-21 15:50:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:26,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127206358] [2021-05-21 15:50:26,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127206358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697572197] [2021-05-21 15:50:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:26,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:50:26,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:26,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:50:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:26,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697572197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:26,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:26,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:50:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212974486] [2021-05-21 15:50:26,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:26,863 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:27,503 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-05-21 15:50:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:50:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:50:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:27,508 INFO L225 Difference]: With dead ends: 4816 [2021-05-21 15:50:27,508 INFO L226 Difference]: Without dead ends: 4241 [2021-05-21 15:50:27,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:50:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-05-21 15:50:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-05-21 15:50:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-05-21 15:50:27,533 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-05-21 15:50:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:27,533 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-05-21 15:50:27,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-05-21 15:50:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:27,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:27,535 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:27,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-21 15:50:27,736 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-05-21 15:50:27,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:27,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648527144] [2021-05-21 15:50:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:27,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:27,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648527144] [2021-05-21 15:50:27,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648527144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:27,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985423849] [2021-05-21 15:50:27,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:28,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985423849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:28,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:28,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-05-21 15:50:28,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101767331] [2021-05-21 15:50:28,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:50:28,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:28,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:50:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:50:28,077 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:28,444 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-05-21 15:50:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:50:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:28,447 INFO L225 Difference]: With dead ends: 3364 [2021-05-21 15:50:28,447 INFO L226 Difference]: Without dead ends: 3030 [2021-05-21 15:50:28,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:50:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-05-21 15:50:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-05-21 15:50:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-05-21 15:50:28,496 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-05-21 15:50:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:28,496 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-05-21 15:50:28,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-05-21 15:50:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:28,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:28,498 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:28,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 15:50:28,699 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-05-21 15:50:28,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:28,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746756700] [2021-05-21 15:50:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:28,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:28,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746756700] [2021-05-21 15:50:28,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746756700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:28,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261508502] [2021-05-21 15:50:28,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:28,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:29,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261508502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:29,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:29,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719252466] [2021-05-21 15:50:29,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:29,022 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:29,292 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-05-21 15:50:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:50:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:29,296 INFO L225 Difference]: With dead ends: 4086 [2021-05-21 15:50:29,296 INFO L226 Difference]: Without dead ends: 3816 [2021-05-21 15:50:29,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:50:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-05-21 15:50:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-05-21 15:50:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-05-21 15:50:29,322 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-05-21 15:50:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:29,322 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-05-21 15:50:29,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-05-21 15:50:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:29,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:29,324 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:29,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 15:50:29,524 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-05-21 15:50:29,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:29,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290869454] [2021-05-21 15:50:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:29,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290869454] [2021-05-21 15:50:29,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290869454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:29,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886668218] [2021-05-21 15:50:29,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:29,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:50:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:29,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:29,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886668218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:29,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:29,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:29,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996787686] [2021-05-21 15:50:29,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:29,864 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:30,174 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-05-21 15:50:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:50:30,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:30,178 INFO L225 Difference]: With dead ends: 4046 [2021-05-21 15:50:30,179 INFO L226 Difference]: Without dead ends: 3776 [2021-05-21 15:50:30,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:50:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-05-21 15:50:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-05-21 15:50:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-05-21 15:50:30,205 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-05-21 15:50:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:30,205 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-05-21 15:50:30,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-05-21 15:50:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:30,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:30,218 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:30,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 15:50:30,419 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-05-21 15:50:30,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:30,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346829935] [2021-05-21 15:50:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:30,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346829935] [2021-05-21 15:50:30,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346829935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876492193] [2021-05-21 15:50:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:30,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:30,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876492193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:30,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:30,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:30,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745183362] [2021-05-21 15:50:30,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:30,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:30,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:30,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:30,729 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:31,000 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-05-21 15:50:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:50:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:31,004 INFO L225 Difference]: With dead ends: 4096 [2021-05-21 15:50:31,004 INFO L226 Difference]: Without dead ends: 3826 [2021-05-21 15:50:31,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:50:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-05-21 15:50:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-05-21 15:50:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-05-21 15:50:31,031 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-05-21 15:50:31,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:31,031 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-05-21 15:50:31,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-05-21 15:50:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:31,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:31,033 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:31,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-21 15:50:31,235 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:31,235 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-05-21 15:50:31,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:31,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702552422] [2021-05-21 15:50:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:31,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:31,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702552422] [2021-05-21 15:50:31,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702552422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:31,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851194928] [2021-05-21 15:50:31,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:31,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:50:31,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:31,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851194928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:31,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:31,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634513766] [2021-05-21 15:50:31,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:31,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:31,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:31,565 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:31,940 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-05-21 15:50:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:50:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:31,944 INFO L225 Difference]: With dead ends: 4121 [2021-05-21 15:50:31,944 INFO L226 Difference]: Without dead ends: 3851 [2021-05-21 15:50:31,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:50:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-05-21 15:50:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-05-21 15:50:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-05-21 15:50:32,003 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-05-21 15:50:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:32,003 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-05-21 15:50:32,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-05-21 15:50:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:32,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:32,005 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:32,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:32,206 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-05-21 15:50:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:32,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638648451] [2021-05-21 15:50:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:32,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638648451] [2021-05-21 15:50:32,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638648451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288229481] [2021-05-21 15:50:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:32,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:50:32,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:32,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:32,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288229481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:32,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:32,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:32,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924945187] [2021-05-21 15:50:32,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:32,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:32,508 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:32,847 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-05-21 15:50:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:50:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:32,851 INFO L225 Difference]: With dead ends: 4146 [2021-05-21 15:50:32,851 INFO L226 Difference]: Without dead ends: 3876 [2021-05-21 15:50:32,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:50:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-05-21 15:50:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-05-21 15:50:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-05-21 15:50:32,882 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-05-21 15:50:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:32,882 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-05-21 15:50:32,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-05-21 15:50:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:32,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:32,884 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:33,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 15:50:33,085 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-05-21 15:50:33,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:33,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083673522] [2021-05-21 15:50:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:33,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083673522] [2021-05-21 15:50:33,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083673522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755898400] [2021-05-21 15:50:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:33,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755898400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:33,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:33,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:33,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894984973] [2021-05-21 15:50:33,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:33,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:33,395 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:33,828 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-05-21 15:50:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:50:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:33,831 INFO L225 Difference]: With dead ends: 4171 [2021-05-21 15:50:33,831 INFO L226 Difference]: Without dead ends: 3901 [2021-05-21 15:50:33,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:50:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-05-21 15:50:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-05-21 15:50:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-05-21 15:50:33,861 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-05-21 15:50:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:33,861 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-05-21 15:50:33,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-05-21 15:50:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:33,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:33,863 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:34,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 15:50:34,064 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:34,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-05-21 15:50:34,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:34,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558536425] [2021-05-21 15:50:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:34,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:34,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558536425] [2021-05-21 15:50:34,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558536425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:34,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796622505] [2021-05-21 15:50:34,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:34,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:34,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:34,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:34,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:34,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796622505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:34,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:34,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:34,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903617876] [2021-05-21 15:50:34,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:34,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:34,359 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:34,739 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-05-21 15:50:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:50:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:34,743 INFO L225 Difference]: With dead ends: 4196 [2021-05-21 15:50:34,743 INFO L226 Difference]: Without dead ends: 3926 [2021-05-21 15:50:34,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:50:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-05-21 15:50:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-05-21 15:50:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-05-21 15:50:34,775 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-05-21 15:50:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:34,775 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-05-21 15:50:34,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-05-21 15:50:34,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:34,777 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:34,777 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:34,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:34,985 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-05-21 15:50:34,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:34,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581036450] [2021-05-21 15:50:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:35,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581036450] [2021-05-21 15:50:35,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581036450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2977303] [2021-05-21 15:50:35,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:35,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:50:35,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:35,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:35,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2977303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:35,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:35,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:35,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538584354] [2021-05-21 15:50:35,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:35,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:35,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:35,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:35,300 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:35,765 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-05-21 15:50:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:50:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:35,769 INFO L225 Difference]: With dead ends: 4221 [2021-05-21 15:50:35,769 INFO L226 Difference]: Without dead ends: 3951 [2021-05-21 15:50:35,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:50:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-05-21 15:50:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-05-21 15:50:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-05-21 15:50:35,803 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-05-21 15:50:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:35,803 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-05-21 15:50:35,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-05-21 15:50:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:35,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:35,806 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:36,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:36,006 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:36,007 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-05-21 15:50:36,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:36,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014095969] [2021-05-21 15:50:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:36,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:36,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014095969] [2021-05-21 15:50:36,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014095969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:36,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307912946] [2021-05-21 15:50:36,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:36,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:36,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307912946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:36,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:36,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:36,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179197965] [2021-05-21 15:50:36,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:36,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:36,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:36,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:36,304 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:36,691 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-05-21 15:50:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:50:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:36,695 INFO L225 Difference]: With dead ends: 4246 [2021-05-21 15:50:36,695 INFO L226 Difference]: Without dead ends: 3976 [2021-05-21 15:50:36,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:50:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-05-21 15:50:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-05-21 15:50:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-05-21 15:50:36,727 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-05-21 15:50:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:36,727 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-05-21 15:50:36,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-05-21 15:50:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:36,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:36,729 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:36,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:36,929 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-05-21 15:50:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:36,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982930021] [2021-05-21 15:50:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:37,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982930021] [2021-05-21 15:50:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982930021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173425355] [2021-05-21 15:50:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:37,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:50:37,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:37,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173425355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:37,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:37,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:37,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507319534] [2021-05-21 15:50:37,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:37,266 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:37,769 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-05-21 15:50:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:50:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:37,772 INFO L225 Difference]: With dead ends: 4271 [2021-05-21 15:50:37,772 INFO L226 Difference]: Without dead ends: 4001 [2021-05-21 15:50:37,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:50:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-05-21 15:50:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-05-21 15:50:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-05-21 15:50:37,807 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-05-21 15:50:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:37,807 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-05-21 15:50:37,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-05-21 15:50:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:37,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:37,810 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:38,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 15:50:38,010 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-05-21 15:50:38,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:38,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660128652] [2021-05-21 15:50:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:38,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:38,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660128652] [2021-05-21 15:50:38,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660128652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:38,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106537648] [2021-05-21 15:50:38,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:38,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:50:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:38,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106537648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:38,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:38,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:38,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264449894] [2021-05-21 15:50:38,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:38,314 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:38,789 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-05-21 15:50:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:50:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:38,793 INFO L225 Difference]: With dead ends: 4296 [2021-05-21 15:50:38,793 INFO L226 Difference]: Without dead ends: 4026 [2021-05-21 15:50:38,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:50:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-05-21 15:50:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-05-21 15:50:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-05-21 15:50:38,827 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-05-21 15:50:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:38,828 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-05-21 15:50:38,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-05-21 15:50:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:38,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:38,830 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:39,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 15:50:39,037 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-05-21 15:50:39,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:39,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569861342] [2021-05-21 15:50:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:39,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:39,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569861342] [2021-05-21 15:50:39,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569861342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:39,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829437695] [2021-05-21 15:50:39,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:39,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829437695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:39,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:39,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019953847] [2021-05-21 15:50:39,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:39,355 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:39,894 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-05-21 15:50:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:50:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:39,898 INFO L225 Difference]: With dead ends: 4321 [2021-05-21 15:50:39,898 INFO L226 Difference]: Without dead ends: 4051 [2021-05-21 15:50:39,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:50:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-05-21 15:50:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-05-21 15:50:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-05-21 15:50:39,932 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-05-21 15:50:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:39,933 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-05-21 15:50:39,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-05-21 15:50:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:39,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:39,935 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:40,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:40,140 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-05-21 15:50:40,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:40,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592792846] [2021-05-21 15:50:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:40,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:40,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592792846] [2021-05-21 15:50:40,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592792846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:40,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837199218] [2021-05-21 15:50:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:40,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:40,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:40,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837199218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:40,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:40,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:40,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754996085] [2021-05-21 15:50:40,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:40,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:40,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:40,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:40,413 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:40,837 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-05-21 15:50:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:50:40,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:40,842 INFO L225 Difference]: With dead ends: 4391 [2021-05-21 15:50:40,842 INFO L226 Difference]: Without dead ends: 4121 [2021-05-21 15:50:40,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:50:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-05-21 15:50:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-05-21 15:50:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-05-21 15:50:40,892 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-05-21 15:50:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:40,892 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-05-21 15:50:40,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-05-21 15:50:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:40,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:40,894 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:41,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 15:50:41,095 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-05-21 15:50:41,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:41,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706266827] [2021-05-21 15:50:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:41,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:41,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706266827] [2021-05-21 15:50:41,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706266827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:41,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495742569] [2021-05-21 15:50:41,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:41,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:50:41,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:41,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495742569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:41,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:41,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:41,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115545174] [2021-05-21 15:50:41,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:41,443 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:42,088 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-05-21 15:50:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:50:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:42,094 INFO L225 Difference]: With dead ends: 4969 [2021-05-21 15:50:42,094 INFO L226 Difference]: Without dead ends: 4346 [2021-05-21 15:50:42,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=866, Invalid=2556, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:50:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-05-21 15:50:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-05-21 15:50:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-05-21 15:50:42,128 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-05-21 15:50:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:42,128 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-05-21 15:50:42,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-05-21 15:50:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:42,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:42,131 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:42,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-21 15:50:42,332 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-05-21 15:50:42,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:42,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692979746] [2021-05-21 15:50:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:42,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692979746] [2021-05-21 15:50:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692979746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558840927] [2021-05-21 15:50:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:42,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558840927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:42,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:42,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:50:42,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613510681] [2021-05-21 15:50:42,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:42,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:42,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:42,611 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:43,116 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-05-21 15:50:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:50:43,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:43,121 INFO L225 Difference]: With dead ends: 5198 [2021-05-21 15:50:43,121 INFO L226 Difference]: Without dead ends: 4928 [2021-05-21 15:50:43,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:50:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-05-21 15:50:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-05-21 15:50:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-05-21 15:50:43,164 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-05-21 15:50:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:43,165 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-05-21 15:50:43,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-05-21 15:50:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:50:43,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:43,167 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:43,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 15:50:43,368 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-05-21 15:50:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:43,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953598949] [2021-05-21 15:50:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:43,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:43,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953598949] [2021-05-21 15:50:43,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953598949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:43,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643182406] [2021-05-21 15:50:43,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:43,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:50:43,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:43,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:50:43,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:43,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643182406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:43,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:43,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:50:43,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226703101] [2021-05-21 15:50:43,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:43,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:43,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:43,685 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:44,353 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-05-21 15:50:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:50:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:50:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:44,357 INFO L225 Difference]: With dead ends: 5021 [2021-05-21 15:50:44,357 INFO L226 Difference]: Without dead ends: 4446 [2021-05-21 15:50:44,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:50:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-05-21 15:50:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-05-21 15:50:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-05-21 15:50:44,386 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-05-21 15:50:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:44,386 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-05-21 15:50:44,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-05-21 15:50:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:44,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:44,388 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:44,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:44,589 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-05-21 15:50:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:44,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551068657] [2021-05-21 15:50:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:44,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:44,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551068657] [2021-05-21 15:50:44,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551068657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:44,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685044153] [2021-05-21 15:50:44,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:44,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:50:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:44,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685044153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:44,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:44,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:44,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468940344] [2021-05-21 15:50:44,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:44,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:44,936 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:45,272 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-05-21 15:50:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:50:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:45,276 INFO L225 Difference]: With dead ends: 3821 [2021-05-21 15:50:45,276 INFO L226 Difference]: Without dead ends: 3551 [2021-05-21 15:50:45,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:50:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-05-21 15:50:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-05-21 15:50:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-05-21 15:50:45,303 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-05-21 15:50:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:45,304 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-05-21 15:50:45,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-05-21 15:50:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:45,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:45,306 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:45,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:45,506 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-05-21 15:50:45,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:45,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648776197] [2021-05-21 15:50:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:45,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:45,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648776197] [2021-05-21 15:50:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648776197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:45,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479057249] [2021-05-21 15:50:45,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:45,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:45,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479057249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:45,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:45,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463443352] [2021-05-21 15:50:45,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:45,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:45,874 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:46,214 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-05-21 15:50:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:50:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:46,218 INFO L225 Difference]: With dead ends: 4241 [2021-05-21 15:50:46,218 INFO L226 Difference]: Without dead ends: 3971 [2021-05-21 15:50:46,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:50:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-05-21 15:50:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-05-21 15:50:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-05-21 15:50:46,247 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-05-21 15:50:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:46,247 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-05-21 15:50:46,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-05-21 15:50:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:46,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:46,249 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:46,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:46,450 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-05-21 15:50:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:46,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215890741] [2021-05-21 15:50:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:46,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:46,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215890741] [2021-05-21 15:50:46,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215890741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:46,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738656937] [2021-05-21 15:50:46,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:46,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:46,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:46,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738656937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:46,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:46,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:46,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146167307] [2021-05-21 15:50:46,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:46,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:46,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:46,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:46,762 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:47,085 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-05-21 15:50:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:50:47,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:47,089 INFO L225 Difference]: With dead ends: 4271 [2021-05-21 15:50:47,089 INFO L226 Difference]: Without dead ends: 4001 [2021-05-21 15:50:47,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:50:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-05-21 15:50:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-05-21 15:50:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-05-21 15:50:47,121 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-05-21 15:50:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:47,121 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-05-21 15:50:47,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-05-21 15:50:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:47,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:47,123 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:47,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-05-21 15:50:47,323 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-05-21 15:50:47,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:47,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417084070] [2021-05-21 15:50:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:47,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:47,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417084070] [2021-05-21 15:50:47,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417084070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:47,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595881348] [2021-05-21 15:50:47,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:47,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:50:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:47,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595881348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:47,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:47,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:47,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371754984] [2021-05-21 15:50:47,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:47,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:47,652 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:48,043 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-05-21 15:50:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:50:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:48,048 INFO L225 Difference]: With dead ends: 4296 [2021-05-21 15:50:48,048 INFO L226 Difference]: Without dead ends: 4026 [2021-05-21 15:50:48,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:50:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-05-21 15:50:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-05-21 15:50:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-05-21 15:50:48,089 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-05-21 15:50:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:48,089 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-05-21 15:50:48,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-05-21 15:50:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:48,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:48,091 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:48,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:48,292 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-05-21 15:50:48,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:48,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606182449] [2021-05-21 15:50:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:48,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606182449] [2021-05-21 15:50:48,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606182449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496278397] [2021-05-21 15:50:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:48,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:48,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:48,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496278397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:48,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:48,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:48,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361830925] [2021-05-21 15:50:48,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:48,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:48,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:48,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:48,616 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:49,022 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-05-21 15:50:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:50:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:49,027 INFO L225 Difference]: With dead ends: 4321 [2021-05-21 15:50:49,027 INFO L226 Difference]: Without dead ends: 4051 [2021-05-21 15:50:49,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:50:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-05-21 15:50:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-05-21 15:50:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-05-21 15:50:49,057 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-05-21 15:50:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:49,058 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-05-21 15:50:49,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-05-21 15:50:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:49,060 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:49,060 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:49,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 15:50:49,260 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:49,260 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-05-21 15:50:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144740312] [2021-05-21 15:50:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:49,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144740312] [2021-05-21 15:50:49,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144740312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377972999] [2021-05-21 15:50:49,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:49,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:50:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:49,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377972999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:49,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:49,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622945013] [2021-05-21 15:50:49,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:49,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:49,579 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:50,017 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-05-21 15:50:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:50:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:50,020 INFO L225 Difference]: With dead ends: 4346 [2021-05-21 15:50:50,020 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:50:50,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:50:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:50:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-05-21 15:50:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-05-21 15:50:50,049 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-05-21 15:50:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:50,049 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-05-21 15:50:50,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-05-21 15:50:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:50,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:50,051 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:50,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:50,265 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-05-21 15:50:50,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:50,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556482761] [2021-05-21 15:50:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:50,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556482761] [2021-05-21 15:50:50,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556482761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394561042] [2021-05-21 15:50:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:50,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:50:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:50,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394561042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:50,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:50,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:50,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306786047] [2021-05-21 15:50:50,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:50,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:50,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:50,549 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:50,917 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-05-21 15:50:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:50:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:50,921 INFO L225 Difference]: With dead ends: 4371 [2021-05-21 15:50:50,921 INFO L226 Difference]: Without dead ends: 4101 [2021-05-21 15:50:50,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:50:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-05-21 15:50:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-05-21 15:50:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-05-21 15:50:50,951 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-05-21 15:50:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:50,951 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-05-21 15:50:50,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-05-21 15:50:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:50,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:50,953 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:51,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 15:50:51,154 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-05-21 15:50:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:51,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308843092] [2021-05-21 15:50:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:51,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:51,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308843092] [2021-05-21 15:50:51,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308843092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:51,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321166776] [2021-05-21 15:50:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:51,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321166776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:51,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:51,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780860676] [2021-05-21 15:50:51,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:51,451 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:51,920 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-05-21 15:50:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:50:51,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:51,925 INFO L225 Difference]: With dead ends: 4396 [2021-05-21 15:50:51,925 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 15:50:51,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:50:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 15:50:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-05-21 15:50:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-05-21 15:50:51,957 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-05-21 15:50:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:51,957 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-05-21 15:50:51,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:51,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-05-21 15:50:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:51,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:51,959 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:52,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 15:50:52,160 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-05-21 15:50:52,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:52,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154513575] [2021-05-21 15:50:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:52,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:52,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154513575] [2021-05-21 15:50:52,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154513575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:52,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566627625] [2021-05-21 15:50:52,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:52,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:52,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566627625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:52,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:52,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:52,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402926458] [2021-05-21 15:50:52,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:52,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:52,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:52,442 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:52,863 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-05-21 15:50:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:50:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:52,867 INFO L225 Difference]: With dead ends: 4421 [2021-05-21 15:50:52,867 INFO L226 Difference]: Without dead ends: 4151 [2021-05-21 15:50:52,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:50:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-05-21 15:50:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-05-21 15:50:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-05-21 15:50:52,904 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-05-21 15:50:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:52,904 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-05-21 15:50:52,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-05-21 15:50:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:52,907 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:52,907 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:53,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:53,108 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:53,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-05-21 15:50:53,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:53,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325443654] [2021-05-21 15:50:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:53,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:53,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325443654] [2021-05-21 15:50:53,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325443654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:53,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887680439] [2021-05-21 15:50:53,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:53,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:50:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:53,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:53,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887680439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:53,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:53,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879017980] [2021-05-21 15:50:53,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:53,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:53,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:53,449 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:53,956 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-05-21 15:50:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:50:53,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:53,961 INFO L225 Difference]: With dead ends: 4446 [2021-05-21 15:50:53,961 INFO L226 Difference]: Without dead ends: 4176 [2021-05-21 15:50:53,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:50:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-05-21 15:50:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-05-21 15:50:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-05-21 15:50:54,001 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-05-21 15:50:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:54,001 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-05-21 15:50:54,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-05-21 15:50:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:54,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:54,003 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:54,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-21 15:50:54,205 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-05-21 15:50:54,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:54,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638308036] [2021-05-21 15:50:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:54,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638308036] [2021-05-21 15:50:54,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638308036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521874341] [2021-05-21 15:50:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:54,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:50:54,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:54,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:54,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521874341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:54,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:54,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631064269] [2021-05-21 15:50:54,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:54,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:54,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:54,481 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:54,935 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-05-21 15:50:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:50:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:54,940 INFO L225 Difference]: With dead ends: 4471 [2021-05-21 15:50:54,940 INFO L226 Difference]: Without dead ends: 4201 [2021-05-21 15:50:54,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:50:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-05-21 15:50:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-05-21 15:50:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-05-21 15:50:54,988 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-05-21 15:50:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:54,988 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-05-21 15:50:54,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-05-21 15:50:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:54,991 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:54,991 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:55,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:55,192 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-05-21 15:50:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:55,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918130547] [2021-05-21 15:50:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:55,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918130547] [2021-05-21 15:50:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918130547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076135158] [2021-05-21 15:50:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:55,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:50:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:55,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076135158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:55,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:55,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:55,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787407303] [2021-05-21 15:50:55,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:55,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:55,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:55,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:55,485 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:56,038 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-05-21 15:50:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:50:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:56,043 INFO L225 Difference]: With dead ends: 4496 [2021-05-21 15:50:56,043 INFO L226 Difference]: Without dead ends: 4226 [2021-05-21 15:50:56,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:50:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-21 15:50:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-05-21 15:50:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-05-21 15:50:56,087 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-05-21 15:50:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:56,087 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-05-21 15:50:56,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-05-21 15:50:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:56,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:56,089 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:56,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:56,290 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:56,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-05-21 15:50:56,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:56,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942712490] [2021-05-21 15:50:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:56,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:56,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942712490] [2021-05-21 15:50:56,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942712490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:56,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858447652] [2021-05-21 15:50:56,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:56,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:50:56,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:56,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:56,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858447652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:56,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:56,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:56,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650427541] [2021-05-21 15:50:56,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:56,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:56,577 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:57,059 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-05-21 15:50:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:50:57,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:57,063 INFO L225 Difference]: With dead ends: 4566 [2021-05-21 15:50:57,063 INFO L226 Difference]: Without dead ends: 4296 [2021-05-21 15:50:57,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:50:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-05-21 15:50:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-05-21 15:50:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-05-21 15:50:57,101 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-05-21 15:50:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:57,101 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-05-21 15:50:57,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-05-21 15:50:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:57,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:57,104 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:57,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:57,304 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-05-21 15:50:57,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:57,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839455835] [2021-05-21 15:50:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:57,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:57,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839455835] [2021-05-21 15:50:57,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839455835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:57,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78799971] [2021-05-21 15:50:57,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:57,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78799971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:57,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:57,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:50:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732066250] [2021-05-21 15:50:57,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:50:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:57,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:50:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:50:57,608 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:58,231 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-05-21 15:50:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:50:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:58,236 INFO L225 Difference]: With dead ends: 5144 [2021-05-21 15:50:58,236 INFO L226 Difference]: Without dead ends: 4521 [2021-05-21 15:50:58,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:50:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-05-21 15:50:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-05-21 15:50:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-05-21 15:50:58,269 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-05-21 15:50:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:58,270 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-05-21 15:50:58,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-05-21 15:50:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:58,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:58,272 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:58,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:58,473 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-05-21 15:50:58,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:58,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375242017] [2021-05-21 15:50:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:58,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:58,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375242017] [2021-05-21 15:50:58,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375242017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:58,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433121424] [2021-05-21 15:50:58,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:58,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:50:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:58,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433121424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:58,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:58,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-05-21 15:50:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049205090] [2021-05-21 15:50:58,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:50:58,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:50:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:50:58,762 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:50:59,239 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-05-21 15:50:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:50:59,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:50:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:50:59,244 INFO L225 Difference]: With dead ends: 5348 [2021-05-21 15:50:59,244 INFO L226 Difference]: Without dead ends: 5078 [2021-05-21 15:50:59,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:50:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-05-21 15:50:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-05-21 15:50:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-05-21 15:50:59,282 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-05-21 15:50:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:50:59,282 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-05-21 15:50:59,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:50:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-05-21 15:50:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:50:59,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:50:59,285 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:50:59,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-05-21 15:50:59,485 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:50:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:50:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-05-21 15:50:59,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:50:59,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219240303] [2021-05-21 15:50:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:50:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:50:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:59,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:50:59,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219240303] [2021-05-21 15:50:59,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219240303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:59,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843709268] [2021-05-21 15:50:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:50:59,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:50:59,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:50:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:50:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:50:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:50:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843709268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:50:59,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:50:59,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:50:59,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617060120] [2021-05-21 15:50:59,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:50:59,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:50:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:50:59,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:50:59,790 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:00,449 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-05-21 15:51:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:51:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:51:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:00,454 INFO L225 Difference]: With dead ends: 5216 [2021-05-21 15:51:00,454 INFO L226 Difference]: Without dead ends: 4641 [2021-05-21 15:51:00,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:51:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-05-21 15:51:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-05-21 15:51:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-05-21 15:51:00,480 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-05-21 15:51:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:00,480 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-05-21 15:51:00,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-05-21 15:51:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:00,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:00,482 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:00,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-21 15:51:00,682 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:00,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-05-21 15:51:00,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:00,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385531344] [2021-05-21 15:51:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:00,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385531344] [2021-05-21 15:51:00,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385531344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:00,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616830169] [2021-05-21 15:51:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:00,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:00,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:00,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:01,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616830169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:01,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:01,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-05-21 15:51:01,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802785241] [2021-05-21 15:51:01,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:51:01,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:01,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:51:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:51:01,105 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:01,455 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-05-21 15:51:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:51:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:01,459 INFO L225 Difference]: With dead ends: 3614 [2021-05-21 15:51:01,459 INFO L226 Difference]: Without dead ends: 3280 [2021-05-21 15:51:01,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:51:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-05-21 15:51:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-05-21 15:51:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.71319018404908) internal successors, (7076), 2608 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-05-21 15:51:01,482 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-05-21 15:51:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:01,483 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-05-21 15:51:01,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-05-21 15:51:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:01,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:01,484 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:01,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 15:51:01,685 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-05-21 15:51:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:01,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085668479] [2021-05-21 15:51:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:01,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:01,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085668479] [2021-05-21 15:51:01,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085668479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128010467] [2021-05-21 15:51:01,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:01,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:51:01,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:02,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128010467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:02,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:02,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:02,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762060489] [2021-05-21 15:51:02,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:02,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:02,038 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:02,317 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-05-21 15:51:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:51:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:02,321 INFO L225 Difference]: With dead ends: 4436 [2021-05-21 15:51:02,321 INFO L226 Difference]: Without dead ends: 4166 [2021-05-21 15:51:02,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:51:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-05-21 15:51:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-05-21 15:51:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.722747093023256) internal successors, (7493), 2752 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-05-21 15:51:02,347 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-05-21 15:51:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:02,347 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-05-21 15:51:02,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-05-21 15:51:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:02,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:02,349 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:02,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 15:51:02,550 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:02,550 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-05-21 15:51:02,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:02,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259664667] [2021-05-21 15:51:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:02,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:02,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259664667] [2021-05-21 15:51:02,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259664667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:02,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132553755] [2021-05-21 15:51:02,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:02,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:51:02,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:02,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132553755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:02,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:02,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:02,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806120968] [2021-05-21 15:51:02,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:02,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:02,917 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:03,258 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-05-21 15:51:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:51:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:03,262 INFO L225 Difference]: With dead ends: 4396 [2021-05-21 15:51:03,262 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 15:51:03,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:51:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 15:51:03,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-05-21 15:51:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.73010258224266) internal successors, (7718), 2827 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-05-21 15:51:03,289 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-05-21 15:51:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:03,289 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-05-21 15:51:03,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-05-21 15:51:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:03,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:03,291 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:03,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 15:51:03,492 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-05-21 15:51:03,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:03,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980990537] [2021-05-21 15:51:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:03,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980990537] [2021-05-21 15:51:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980990537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212959643] [2021-05-21 15:51:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:03,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212959643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:03,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:03,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:03,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035390437] [2021-05-21 15:51:03,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:03,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:03,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:03,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:03,866 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:04,190 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-05-21 15:51:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:51:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:04,194 INFO L225 Difference]: With dead ends: 4446 [2021-05-21 15:51:04,194 INFO L226 Difference]: Without dead ends: 4176 [2021-05-21 15:51:04,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:51:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-05-21 15:51:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-05-21 15:51:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7370778773259823) internal successors, (7943), 2902 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-05-21 15:51:04,222 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-05-21 15:51:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:04,222 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-05-21 15:51:04,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-05-21 15:51:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:04,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:04,224 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:04,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-21 15:51:04,425 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-05-21 15:51:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744408490] [2021-05-21 15:51:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:04,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744408490] [2021-05-21 15:51:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744408490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278435890] [2021-05-21 15:51:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:04,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:04,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:04,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:04,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278435890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:04,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:04,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:04,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093051880] [2021-05-21 15:51:04,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:04,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:04,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:04,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:04,783 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:05,184 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-05-21 15:51:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:51:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:05,188 INFO L225 Difference]: With dead ends: 4471 [2021-05-21 15:51:05,188 INFO L226 Difference]: Without dead ends: 4201 [2021-05-21 15:51:05,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:51:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-05-21 15:51:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-05-21 15:51:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7437017131340276) internal successors, (8168), 2977 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-05-21 15:51:05,216 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-05-21 15:51:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:05,216 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-05-21 15:51:05,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-05-21 15:51:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:05,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:05,218 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:05,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:05,419 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:05,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-05-21 15:51:05,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:05,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029432963] [2021-05-21 15:51:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:05,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:05,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029432963] [2021-05-21 15:51:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029432963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:05,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702255010] [2021-05-21 15:51:05,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:05,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:51:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:05,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702255010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:05,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:05,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:05,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136605576] [2021-05-21 15:51:05,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:05,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:05,763 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:06,123 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-05-21 15:51:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:51:06,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:06,127 INFO L225 Difference]: With dead ends: 4496 [2021-05-21 15:51:06,127 INFO L226 Difference]: Without dead ends: 4226 [2021-05-21 15:51:06,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:51:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-21 15:51:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-05-21 15:51:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.75) internal successors, (8393), 3052 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-05-21 15:51:06,157 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-05-21 15:51:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:06,157 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-05-21 15:51:06,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-05-21 15:51:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:06,159 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:06,159 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:06,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:06,361 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-05-21 15:51:06,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:06,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271922249] [2021-05-21 15:51:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:06,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:06,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271922249] [2021-05-21 15:51:06,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271922249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:06,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642171920] [2021-05-21 15:51:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:06,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:06,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:06,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:06,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:06,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642171920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:06,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:06,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231939123] [2021-05-21 15:51:06,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:06,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:06,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:06,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:06,702 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:07,164 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-05-21 15:51:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:51:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:07,168 INFO L225 Difference]: With dead ends: 4521 [2021-05-21 15:51:07,168 INFO L226 Difference]: Without dead ends: 4251 [2021-05-21 15:51:07,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:51:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-05-21 15:51:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-05-21 15:51:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7559961624560283) internal successors, (8618), 3127 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-05-21 15:51:07,200 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-05-21 15:51:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:07,200 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-05-21 15:51:07,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-05-21 15:51:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:07,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:07,202 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:07,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:07,403 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-05-21 15:51:07,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:07,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824234859] [2021-05-21 15:51:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:07,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:07,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824234859] [2021-05-21 15:51:07,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824234859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:07,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305257147] [2021-05-21 15:51:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:07,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:51:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305257147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589122339] [2021-05-21 15:51:07,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:07,733 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:08,128 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-05-21 15:51:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:51:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:08,133 INFO L225 Difference]: With dead ends: 4546 [2021-05-21 15:51:08,133 INFO L226 Difference]: Without dead ends: 4276 [2021-05-21 15:51:08,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:51:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-05-21 15:51:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-05-21 15:51:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7617114303560273) internal successors, (8843), 3202 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-05-21 15:51:08,164 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-05-21 15:51:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:08,164 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-05-21 15:51:08,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-05-21 15:51:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:08,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:08,167 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:08,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:08,367 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-05-21 15:51:08,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:08,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818340159] [2021-05-21 15:51:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:08,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:08,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818340159] [2021-05-21 15:51:08,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818340159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:08,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947039375] [2021-05-21 15:51:08,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:08,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:51:08,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:08,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:08,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947039375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:08,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:08,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263897823] [2021-05-21 15:51:08,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:08,733 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:09,240 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-05-21 15:51:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:51:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:09,245 INFO L225 Difference]: With dead ends: 4571 [2021-05-21 15:51:09,245 INFO L226 Difference]: Without dead ends: 4301 [2021-05-21 15:51:09,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:51:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-05-21 15:51:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-05-21 15:51:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.767165090021361) internal successors, (9068), 3277 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-05-21 15:51:09,281 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-05-21 15:51:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:09,281 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-05-21 15:51:09,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-05-21 15:51:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:09,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:09,284 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:09,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:09,493 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-05-21 15:51:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:09,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690556678] [2021-05-21 15:51:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:09,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690556678] [2021-05-21 15:51:09,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690556678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:09,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697857403] [2021-05-21 15:51:09,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:09,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697857403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:09,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:09,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:09,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469168961] [2021-05-21 15:51:09,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:09,804 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:10,236 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-05-21 15:51:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:51:10,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:10,252 INFO L225 Difference]: With dead ends: 4596 [2021-05-21 15:51:10,252 INFO L226 Difference]: Without dead ends: 4326 [2021-05-21 15:51:10,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:51:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-05-21 15:51:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-05-21 15:51:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7723747016706444) internal successors, (9293), 3352 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-05-21 15:51:10,284 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-05-21 15:51:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:10,284 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-05-21 15:51:10,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-05-21 15:51:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:10,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:10,287 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:10,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:10,487 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:10,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-05-21 15:51:10,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:10,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995263264] [2021-05-21 15:51:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:10,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:10,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995263264] [2021-05-21 15:51:10,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995263264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:10,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977549021] [2021-05-21 15:51:10,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:10,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:10,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977549021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:10,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:10,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:10,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525361844] [2021-05-21 15:51:10,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:10,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:10,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:10,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:10,814 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:11,353 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-05-21 15:51:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:51:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:11,357 INFO L225 Difference]: With dead ends: 4621 [2021-05-21 15:51:11,357 INFO L226 Difference]: Without dead ends: 4351 [2021-05-21 15:51:11,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:51:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-05-21 15:51:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-05-21 15:51:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7773562882988037) internal successors, (9518), 3427 states have internal predecessors, (9518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-05-21 15:51:11,396 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-05-21 15:51:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:11,397 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-05-21 15:51:11,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-05-21 15:51:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:11,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:11,399 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:11,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:11,600 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-05-21 15:51:11,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:11,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791089547] [2021-05-21 15:51:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:11,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791089547] [2021-05-21 15:51:11,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791089547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745443614] [2021-05-21 15:51:11,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:51:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745443614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:11,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:11,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:11,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695940861] [2021-05-21 15:51:11,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:11,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:11,912 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:12,383 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-05-21 15:51:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:51:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:12,388 INFO L225 Difference]: With dead ends: 4646 [2021-05-21 15:51:12,388 INFO L226 Difference]: Without dead ends: 4376 [2021-05-21 15:51:12,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:51:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-05-21 15:51:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-05-21 15:51:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7821245002855512) internal successors, (9743), 3502 states have internal predecessors, (9743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-05-21 15:51:12,431 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-05-21 15:51:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:12,431 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-05-21 15:51:12,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-05-21 15:51:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:12,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:12,434 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:12,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-21 15:51:12,634 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-05-21 15:51:12,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:12,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585361652] [2021-05-21 15:51:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:12,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:12,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585361652] [2021-05-21 15:51:12,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585361652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:12,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522785749] [2021-05-21 15:51:12,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:12,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:12,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522785749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:12,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:12,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:12,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700557983] [2021-05-21 15:51:12,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:12,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:12,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:12,956 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:13,553 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-05-21 15:51:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:51:13,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:13,557 INFO L225 Difference]: With dead ends: 4671 [2021-05-21 15:51:13,557 INFO L226 Difference]: Without dead ends: 4401 [2021-05-21 15:51:13,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:51:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-05-21 15:51:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-05-21 15:51:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.786692759295499) internal successors, (9968), 3577 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-05-21 15:51:13,607 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-05-21 15:51:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:13,607 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-05-21 15:51:13,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-05-21 15:51:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:13,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:13,610 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:13,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 15:51:13,810 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-05-21 15:51:13,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:13,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80957760] [2021-05-21 15:51:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:13,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80957760] [2021-05-21 15:51:13,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80957760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506319939] [2021-05-21 15:51:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:13,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:51:13,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:14,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506319939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:14,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:14,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:14,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970387485] [2021-05-21 15:51:14,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:14,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:14,113 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:14,603 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-05-21 15:51:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:51:14,603 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:14,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:14,608 INFO L225 Difference]: With dead ends: 4696 [2021-05-21 15:51:14,608 INFO L226 Difference]: Without dead ends: 4426 [2021-05-21 15:51:14,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:51:14,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-05-21 15:51:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-05-21 15:51:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7910733844468782) internal successors, (10193), 3652 states have internal predecessors, (10193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-05-21 15:51:14,649 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-05-21 15:51:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:14,649 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-05-21 15:51:14,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-05-21 15:51:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:14,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:14,652 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:14,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 15:51:14,853 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-05-21 15:51:14,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:14,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156534938] [2021-05-21 15:51:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:14,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156534938] [2021-05-21 15:51:14,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156534938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394630355] [2021-05-21 15:51:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:15,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:51:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:15,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394630355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:15,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:15,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:15,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301074338] [2021-05-21 15:51:15,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:15,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:15,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:15,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:15,173 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:15,806 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-05-21 15:51:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:51:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:15,811 INFO L225 Difference]: With dead ends: 4721 [2021-05-21 15:51:15,811 INFO L226 Difference]: Without dead ends: 4451 [2021-05-21 15:51:15,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:51:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-05-21 15:51:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-05-21 15:51:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.795277703246579) internal successors, (10418), 3727 states have internal predecessors, (10418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-05-21 15:51:15,849 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-05-21 15:51:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:15,850 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-05-21 15:51:15,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-05-21 15:51:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:15,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:15,853 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:16,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:16,053 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-05-21 15:51:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:16,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60520810] [2021-05-21 15:51:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:16,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60520810] [2021-05-21 15:51:16,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60520810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088130662] [2021-05-21 15:51:16,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:16,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088130662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:16,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:16,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:16,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497486073] [2021-05-21 15:51:16,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:16,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:16,372 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:16,872 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-05-21 15:51:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:51:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:16,877 INFO L225 Difference]: With dead ends: 4791 [2021-05-21 15:51:16,877 INFO L226 Difference]: Without dead ends: 4521 [2021-05-21 15:51:16,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:51:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-05-21 15:51:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-05-21 15:51:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.8032614413466597) internal successors, (10658), 3802 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-05-21 15:51:16,928 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-05-21 15:51:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:16,928 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-05-21 15:51:16,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-05-21 15:51:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:16,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:16,931 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:17,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-05-21 15:51:17,131 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-05-21 15:51:17,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:17,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380021486] [2021-05-21 15:51:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:17,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:17,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380021486] [2021-05-21 15:51:17,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380021486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:17,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502551083] [2021-05-21 15:51:17,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:17,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:17,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502551083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:17,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:17,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:51:17,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657394702] [2021-05-21 15:51:17,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:17,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:17,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:17,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:17,442 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:18,144 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-05-21 15:51:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:51:18,144 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:18,149 INFO L225 Difference]: With dead ends: 5369 [2021-05-21 15:51:18,149 INFO L226 Difference]: Without dead ends: 4746 [2021-05-21 15:51:18,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:51:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-05-21 15:51:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-05-21 15:51:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8083569770441064) internal successors, (10888), 3877 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-05-21 15:51:18,185 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-05-21 15:51:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:18,185 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-05-21 15:51:18,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-05-21 15:51:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:18,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:18,188 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:18,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:18,390 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-05-21 15:51:18,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:18,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905768777] [2021-05-21 15:51:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:18,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:18,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905768777] [2021-05-21 15:51:18,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905768777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:18,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471469939] [2021-05-21 15:51:18,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:18,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:51:18,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:18,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471469939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:18,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:18,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:18,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331751637] [2021-05-21 15:51:18,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:18,730 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:19,267 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-05-21 15:51:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:51:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:19,272 INFO L225 Difference]: With dead ends: 5598 [2021-05-21 15:51:19,272 INFO L226 Difference]: Without dead ends: 5328 [2021-05-21 15:51:19,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:51:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-05-21 15:51:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-05-21 15:51:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 2.82154301207789) internal successors, (11447), 4057 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-05-21 15:51:19,313 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-05-21 15:51:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:19,313 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-05-21 15:51:19,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-05-21 15:51:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:51:19,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:19,316 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:19,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:19,516 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-05-21 15:51:19,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:19,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788535198] [2021-05-21 15:51:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:19,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788535198] [2021-05-21 15:51:19,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788535198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29604877] [2021-05-21 15:51:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:19,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:19,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:51:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:19,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29604877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:19,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:19,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:51:19,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610678788] [2021-05-21 15:51:19,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:19,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:19,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:19,813 INFO L87 Difference]: Start difference. First operand 4058 states and 11447 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:20,493 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-05-21 15:51:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:51:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:51:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:20,498 INFO L225 Difference]: With dead ends: 5085 [2021-05-21 15:51:20,498 INFO L226 Difference]: Without dead ends: 4506 [2021-05-21 15:51:20,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:51:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-05-21 15:51:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-05-21 15:51:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7389380530973453) internal successors, (7428), 2712 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-05-21 15:51:20,528 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-05-21 15:51:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:20,528 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-05-21 15:51:20,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-05-21 15:51:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:20,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:20,530 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:20,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:20,730 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-05-21 15:51:20,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:20,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498523532] [2021-05-21 15:51:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:20,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498523532] [2021-05-21 15:51:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498523532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324956072] [2021-05-21 15:51:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:20,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:51:20,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:20,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:21,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324956072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:21,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:21,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557860545] [2021-05-21 15:51:21,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:21,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:21,073 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:21,399 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-05-21 15:51:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:51:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:21,403 INFO L225 Difference]: With dead ends: 4031 [2021-05-21 15:51:21,403 INFO L226 Difference]: Without dead ends: 3761 [2021-05-21 15:51:21,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:51:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-05-21 15:51:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-05-21 15:51:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.7459634015069967) internal successors, (7653), 2787 states have internal predecessors, (7653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-05-21 15:51:21,428 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-05-21 15:51:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:21,428 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-05-21 15:51:21,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:21,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-05-21 15:51:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:21,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:21,430 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:21,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-05-21 15:51:21,631 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-05-21 15:51:21,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:21,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287114951] [2021-05-21 15:51:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:21,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287114951] [2021-05-21 15:51:21,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287114951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134231331] [2021-05-21 15:51:21,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:21,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:51:21,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134231331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:22,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:22,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374229768] [2021-05-21 15:51:22,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:22,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:22,025 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:22,395 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-05-21 15:51:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:51:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:22,399 INFO L225 Difference]: With dead ends: 4501 [2021-05-21 15:51:22,399 INFO L226 Difference]: Without dead ends: 4231 [2021-05-21 15:51:22,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:51:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-05-21 15:51:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-05-21 15:51:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.752620545073375) internal successors, (7878), 2862 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-05-21 15:51:22,427 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-05-21 15:51:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:22,427 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-05-21 15:51:22,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-05-21 15:51:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:22,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:22,429 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:22,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:22,630 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-05-21 15:51:22,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:22,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534202460] [2021-05-21 15:51:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:22,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534202460] [2021-05-21 15:51:22,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534202460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285345818] [2021-05-21 15:51:22,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:22,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:22,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285345818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:22,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:22,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:22,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422265232] [2021-05-21 15:51:22,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:22,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:22,965 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:23,317 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-05-21 15:51:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:51:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:23,321 INFO L225 Difference]: With dead ends: 4531 [2021-05-21 15:51:23,322 INFO L226 Difference]: Without dead ends: 4261 [2021-05-21 15:51:23,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:51:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-05-21 15:51:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-05-21 15:51:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.758937691521961) internal successors, (8103), 2937 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-05-21 15:51:23,350 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-05-21 15:51:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:23,350 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-05-21 15:51:23,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-05-21 15:51:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:23,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:23,352 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-21 15:51:23,553 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-05-21 15:51:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058982067] [2021-05-21 15:51:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:23,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:23,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058982067] [2021-05-21 15:51:23,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058982067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:23,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557187104] [2021-05-21 15:51:23,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:23,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:23,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557187104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:23,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:23,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:23,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418558155] [2021-05-21 15:51:23,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:23,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:23,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:23,931 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:24,356 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-05-21 15:51:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:51:24,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:24,360 INFO L225 Difference]: With dead ends: 4556 [2021-05-21 15:51:24,360 INFO L226 Difference]: Without dead ends: 4286 [2021-05-21 15:51:24,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:51:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-05-21 15:51:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-05-21 15:51:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.764940239043825) internal successors, (8328), 3012 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-05-21 15:51:24,389 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-05-21 15:51:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:24,389 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-05-21 15:51:24,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-05-21 15:51:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:24,391 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:24,391 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:24,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 15:51:24,592 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-05-21 15:51:24,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:24,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743277921] [2021-05-21 15:51:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:24,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743277921] [2021-05-21 15:51:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743277921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688031777] [2021-05-21 15:51:24,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:24,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:51:24,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:24,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:24,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688031777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:24,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:24,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:24,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213943029] [2021-05-21 15:51:24,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:24,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:24,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:24,966 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:25,376 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-05-21 15:51:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:51:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:25,380 INFO L225 Difference]: With dead ends: 4581 [2021-05-21 15:51:25,380 INFO L226 Difference]: Without dead ends: 4311 [2021-05-21 15:51:25,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:51:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-05-21 15:51:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-05-21 15:51:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.770651117589893) internal successors, (8553), 3087 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-05-21 15:51:25,410 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-05-21 15:51:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:25,410 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-05-21 15:51:25,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-05-21 15:51:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:25,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:25,412 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:25,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 15:51:25,613 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-05-21 15:51:25,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:25,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365961585] [2021-05-21 15:51:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:25,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:25,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365961585] [2021-05-21 15:51:25,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365961585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:25,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307627987] [2021-05-21 15:51:25,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:25,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:25,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:25,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307627987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:25,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:25,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289724891] [2021-05-21 15:51:25,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:25,962 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:26,450 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-05-21 15:51:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:51:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:26,454 INFO L225 Difference]: With dead ends: 4606 [2021-05-21 15:51:26,454 INFO L226 Difference]: Without dead ends: 4336 [2021-05-21 15:51:26,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:51:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-05-21 15:51:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-05-21 15:51:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.7760910815939277) internal successors, (8778), 3162 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-05-21 15:51:26,489 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-05-21 15:51:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:26,489 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-05-21 15:51:26,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-05-21 15:51:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:26,492 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:26,492 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:26,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-05-21 15:51:26,707 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-05-21 15:51:26,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:26,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92062944] [2021-05-21 15:51:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:26,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92062944] [2021-05-21 15:51:26,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92062944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245255590] [2021-05-21 15:51:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:26,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:51:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:26,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245255590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:27,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:27,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:27,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751280628] [2021-05-21 15:51:27,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:27,050 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:27,471 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-05-21 15:51:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:51:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:27,475 INFO L225 Difference]: With dead ends: 4631 [2021-05-21 15:51:27,475 INFO L226 Difference]: Without dead ends: 4361 [2021-05-21 15:51:27,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:51:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-05-21 15:51:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-05-21 15:51:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7812789620018536) internal successors, (9003), 3237 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-05-21 15:51:27,510 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-05-21 15:51:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:27,510 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-05-21 15:51:27,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-05-21 15:51:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:27,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:27,512 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:27,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:27,713 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-05-21 15:51:27,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:27,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943578559] [2021-05-21 15:51:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:27,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:27,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943578559] [2021-05-21 15:51:27,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943578559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:27,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771515262] [2021-05-21 15:51:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:27,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:51:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:28,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771515262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:28,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:28,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:28,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690603178] [2021-05-21 15:51:28,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:28,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:28,082 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:28,625 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-05-21 15:51:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:51:28,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:28,629 INFO L225 Difference]: With dead ends: 4656 [2021-05-21 15:51:28,629 INFO L226 Difference]: Without dead ends: 4386 [2021-05-21 15:51:28,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:51:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-05-21 15:51:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-05-21 15:51:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.786231884057971) internal successors, (9228), 3312 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-05-21 15:51:28,675 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-05-21 15:51:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:28,675 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-05-21 15:51:28,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-05-21 15:51:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:28,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:28,678 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:28,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-21 15:51:28,878 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-05-21 15:51:28,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:28,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731674353] [2021-05-21 15:51:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:29,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:29,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731674353] [2021-05-21 15:51:29,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731674353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:29,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247775721] [2021-05-21 15:51:29,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:29,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247775721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:29,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:29,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:29,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848274293] [2021-05-21 15:51:29,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:29,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:29,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:29,193 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:29,646 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-05-21 15:51:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:51:29,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:29,650 INFO L225 Difference]: With dead ends: 4681 [2021-05-21 15:51:29,650 INFO L226 Difference]: Without dead ends: 4411 [2021-05-21 15:51:29,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:51:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-05-21 15:51:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-05-21 15:51:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7909654561558903) internal successors, (9453), 3387 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-05-21 15:51:29,685 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-05-21 15:51:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:29,685 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-05-21 15:51:29,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-05-21 15:51:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:29,687 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:29,687 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:29,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:29,888 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-05-21 15:51:29,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:29,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826866398] [2021-05-21 15:51:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:30,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:30,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826866398] [2021-05-21 15:51:30,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826866398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:30,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741725542] [2021-05-21 15:51:30,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:30,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:30,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:30,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741725542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:30,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:30,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:30,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066250278] [2021-05-21 15:51:30,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:30,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:30,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:30,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:30,218 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:30,778 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-05-21 15:51:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:51:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:30,783 INFO L225 Difference]: With dead ends: 4706 [2021-05-21 15:51:30,783 INFO L226 Difference]: Without dead ends: 4436 [2021-05-21 15:51:30,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:51:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-05-21 15:51:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-05-21 15:51:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7954939341421143) internal successors, (9678), 3462 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-05-21 15:51:30,818 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-05-21 15:51:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:30,818 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-05-21 15:51:30,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-05-21 15:51:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:30,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:30,821 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:31,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:31,021 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-05-21 15:51:31,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:31,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416702264] [2021-05-21 15:51:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:31,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:31,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416702264] [2021-05-21 15:51:31,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416702264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:31,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517963196] [2021-05-21 15:51:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:31,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:51:31,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:31,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517963196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:31,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:31,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:31,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810506422] [2021-05-21 15:51:31,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:31,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:31,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:31,344 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:31,824 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-05-21 15:51:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:51:31,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:31,829 INFO L225 Difference]: With dead ends: 4731 [2021-05-21 15:51:31,829 INFO L226 Difference]: Without dead ends: 4461 [2021-05-21 15:51:31,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:51:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-05-21 15:51:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-05-21 15:51:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.799830364715861) internal successors, (9903), 3537 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-05-21 15:51:31,865 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-05-21 15:51:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:31,865 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-05-21 15:51:31,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-05-21 15:51:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:31,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:31,868 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:32,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:32,069 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-05-21 15:51:32,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:32,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985692101] [2021-05-21 15:51:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:32,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:32,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985692101] [2021-05-21 15:51:32,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985692101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575841351] [2021-05-21 15:51:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:32,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:32,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:32,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:32,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575841351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:32,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:32,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:32,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713091904] [2021-05-21 15:51:32,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:32,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:32,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:32,415 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:33,046 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-05-21 15:51:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:51:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:33,050 INFO L225 Difference]: With dead ends: 4756 [2021-05-21 15:51:33,051 INFO L226 Difference]: Without dead ends: 4486 [2021-05-21 15:51:33,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:51:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-05-21 15:51:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-05-21 15:51:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.8039867109634553) internal successors, (10128), 3612 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-05-21 15:51:33,090 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-05-21 15:51:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:33,090 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-05-21 15:51:33,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-05-21 15:51:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:33,093 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:33,093 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:33,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:33,294 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-05-21 15:51:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:33,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75074387] [2021-05-21 15:51:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:33,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:33,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75074387] [2021-05-21 15:51:33,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75074387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:33,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579505411] [2021-05-21 15:51:33,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:33,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:51:33,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:33,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579505411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:33,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:33,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:33,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621998188] [2021-05-21 15:51:33,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:33,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:33,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:33,620 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:34,191 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-05-21 15:51:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:51:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:34,196 INFO L225 Difference]: With dead ends: 4781 [2021-05-21 15:51:34,197 INFO L226 Difference]: Without dead ends: 4511 [2021-05-21 15:51:34,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:51:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-05-21 15:51:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-05-21 15:51:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.807973962571196) internal successors, (10353), 3687 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-05-21 15:51:34,239 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-05-21 15:51:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:34,239 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-05-21 15:51:34,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-05-21 15:51:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:34,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:34,242 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:34,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-05-21 15:51:34,443 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:34,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-05-21 15:51:34,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:34,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243440226] [2021-05-21 15:51:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:34,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243440226] [2021-05-21 15:51:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243440226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526681106] [2021-05-21 15:51:34,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:34,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:51:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526681106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:34,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:34,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652506145] [2021-05-21 15:51:34,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:34,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:34,773 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:35,418 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-05-21 15:51:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:51:35,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:35,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:35,423 INFO L225 Difference]: With dead ends: 4806 [2021-05-21 15:51:35,423 INFO L226 Difference]: Without dead ends: 4536 [2021-05-21 15:51:35,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:51:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-05-21 15:51:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-05-21 15:51:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.8118022328548644) internal successors, (10578), 3762 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-05-21 15:51:35,480 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-05-21 15:51:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:35,480 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-05-21 15:51:35,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-05-21 15:51:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:35,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:35,483 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:35,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-21 15:51:35,683 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:35,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-05-21 15:51:35,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:35,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636261684] [2021-05-21 15:51:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:35,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:35,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636261684] [2021-05-21 15:51:35,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636261684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:35,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346863423] [2021-05-21 15:51:35,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:35,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:35,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346863423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:35,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:35,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:35,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487346931] [2021-05-21 15:51:35,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:35,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:35,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:35,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:35,985 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:36,522 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-05-21 15:51:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:51:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:36,527 INFO L225 Difference]: With dead ends: 4831 [2021-05-21 15:51:36,527 INFO L226 Difference]: Without dead ends: 4561 [2021-05-21 15:51:36,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:51:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-05-21 15:51:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-05-21 15:51:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.815480844409695) internal successors, (10803), 3837 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-05-21 15:51:36,566 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-05-21 15:51:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:36,566 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-05-21 15:51:36,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-05-21 15:51:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:36,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:36,569 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:36,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-21 15:51:36,770 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-05-21 15:51:36,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:36,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643721443] [2021-05-21 15:51:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:36,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:36,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643721443] [2021-05-21 15:51:36,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643721443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:36,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382048880] [2021-05-21 15:51:36,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:36,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:37,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382048880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:37,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:37,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:37,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768265508] [2021-05-21 15:51:37,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:37,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:37,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:37,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:37,113 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:37,801 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-05-21 15:51:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:51:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:37,806 INFO L225 Difference]: With dead ends: 4916 [2021-05-21 15:51:37,806 INFO L226 Difference]: Without dead ends: 4646 [2021-05-21 15:51:37,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:51:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-05-21 15:51:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-05-21 15:51:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.8241308793456033) internal successors, (11048), 3912 states have internal predecessors, (11048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-05-21 15:51:37,844 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-05-21 15:51:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:37,844 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-05-21 15:51:37,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-05-21 15:51:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:37,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:37,847 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:38,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:38,048 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-05-21 15:51:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:38,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584518041] [2021-05-21 15:51:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:38,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:38,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584518041] [2021-05-21 15:51:38,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584518041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:38,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351843834] [2021-05-21 15:51:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:38,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:51:38,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:38,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351843834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:38,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:38,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-05-21 15:51:38,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684091055] [2021-05-21 15:51:38,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:51:38,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:38,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:51:38,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:51:38,355 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:38,925 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-05-21 15:51:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:51:38,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:38,929 INFO L225 Difference]: With dead ends: 5658 [2021-05-21 15:51:38,930 INFO L226 Difference]: Without dead ends: 5388 [2021-05-21 15:51:38,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:51:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-05-21 15:51:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-05-21 15:51:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.8365102639296187) internal successors, (11607), 4092 states have internal predecessors, (11607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-05-21 15:51:38,968 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-05-21 15:51:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:38,968 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-05-21 15:51:38,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-05-21 15:51:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:51:38,972 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:38,972 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:39,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:39,181 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-05-21 15:51:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:39,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720033198] [2021-05-21 15:51:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:39,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720033198] [2021-05-21 15:51:39,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720033198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104866094] [2021-05-21 15:51:39,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:39,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:51:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:39,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104866094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:39,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:39,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:51:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264267164] [2021-05-21 15:51:39,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:39,491 INFO L87 Difference]: Start difference. First operand 4093 states and 11607 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:40,186 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-05-21 15:51:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:51:40,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:51:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:40,191 INFO L225 Difference]: With dead ends: 5120 [2021-05-21 15:51:40,191 INFO L226 Difference]: Without dead ends: 4631 [2021-05-21 15:51:40,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:51:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-05-21 15:51:40,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-05-21 15:51:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-05-21 15:51:40,219 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-05-21 15:51:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:40,219 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-05-21 15:51:40,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-05-21 15:51:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:40,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:40,221 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:40,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:40,421 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-05-21 15:51:40,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:40,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187041436] [2021-05-21 15:51:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:40,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187041436] [2021-05-21 15:51:40,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187041436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705542678] [2021-05-21 15:51:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:40,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:51:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:51:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:40,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705542678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:40,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:40,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-05-21 15:51:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325515338] [2021-05-21 15:51:40,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:51:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:51:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:51:40,824 INFO L87 Difference]: Start difference. First operand 2634 states and 7216 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:41,211 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-05-21 15:51:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:51:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:41,215 INFO L225 Difference]: With dead ends: 3774 [2021-05-21 15:51:41,215 INFO L226 Difference]: Without dead ends: 3440 [2021-05-21 15:51:41,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:51:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-05-21 15:51:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-05-21 15:51:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.717439293598234) internal successors, (7386), 2718 states have internal predecessors, (7386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-05-21 15:51:41,240 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-05-21 15:51:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:41,240 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-05-21 15:51:41,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-05-21 15:51:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:41,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:41,242 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:41,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:41,443 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2008975183, now seen corresponding path program 186 times [2021-05-21 15:51:41,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:41,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247595422] [2021-05-21 15:51:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:41,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:41,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247595422] [2021-05-21 15:51:41,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247595422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:41,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587559378] [2021-05-21 15:51:41,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:41,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:51:41,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:41,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:41,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:41,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587559378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:41,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:41,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819586798] [2021-05-21 15:51:41,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:41,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:41,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:41,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:41,833 INFO L87 Difference]: Start difference. First operand 2719 states and 7386 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:42,172 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-05-21 15:51:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:51:42,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:42,176 INFO L225 Difference]: With dead ends: 4696 [2021-05-21 15:51:42,176 INFO L226 Difference]: Without dead ends: 4426 [2021-05-21 15:51:42,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:51:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-05-21 15:51:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-05-21 15:51:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7264150943396226) internal successors, (7803), 2862 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-05-21 15:51:42,201 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-05-21 15:51:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:42,202 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-05-21 15:51:42,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-05-21 15:51:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:42,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:42,204 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:42,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-21 15:51:42,404 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash -644426879, now seen corresponding path program 187 times [2021-05-21 15:51:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350026621] [2021-05-21 15:51:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:42,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:42,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350026621] [2021-05-21 15:51:42,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350026621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:42,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895836119] [2021-05-21 15:51:42,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:42,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895836119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:42,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:42,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757620875] [2021-05-21 15:51:42,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:42,798 INFO L87 Difference]: Start difference. First operand 2863 states and 7803 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:43,181 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-05-21 15:51:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:51:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:43,186 INFO L225 Difference]: With dead ends: 4656 [2021-05-21 15:51:43,186 INFO L226 Difference]: Without dead ends: 4386 [2021-05-21 15:51:43,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:51:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-05-21 15:51:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-05-21 15:51:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7334014300306437) internal successors, (8028), 2937 states have internal predecessors, (8028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-05-21 15:51:43,214 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-05-21 15:51:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:43,214 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-05-21 15:51:43,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-05-21 15:51:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:43,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:43,216 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:43,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:43,417 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1373308399, now seen corresponding path program 188 times [2021-05-21 15:51:43,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:43,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141316040] [2021-05-21 15:51:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:43,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:43,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141316040] [2021-05-21 15:51:43,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141316040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:43,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277383961] [2021-05-21 15:51:43,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:43,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277383961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:43,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:43,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:43,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689584899] [2021-05-21 15:51:43,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:43,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:43,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:43,790 INFO L87 Difference]: Start difference. First operand 2938 states and 8028 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:44,133 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-05-21 15:51:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:51:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:44,138 INFO L225 Difference]: With dead ends: 4706 [2021-05-21 15:51:44,138 INFO L226 Difference]: Without dead ends: 4436 [2021-05-21 15:51:44,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:51:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-05-21 15:51:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-05-21 15:51:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.74003984063745) internal successors, (8253), 3012 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-05-21 15:51:44,167 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-05-21 15:51:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:44,167 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-05-21 15:51:44,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-05-21 15:51:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:44,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:44,169 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:44,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:44,370 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash 474784959, now seen corresponding path program 189 times [2021-05-21 15:51:44,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:44,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673699540] [2021-05-21 15:51:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:44,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673699540] [2021-05-21 15:51:44,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673699540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038712209] [2021-05-21 15:51:44,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:44,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:51:44,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:44,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038712209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:44,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:44,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:44,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045854302] [2021-05-21 15:51:44,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:44,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:44,758 INFO L87 Difference]: Start difference. First operand 3013 states and 8253 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:45,187 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-05-21 15:51:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:51:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:45,191 INFO L225 Difference]: With dead ends: 4731 [2021-05-21 15:51:45,191 INFO L226 Difference]: Without dead ends: 4461 [2021-05-21 15:51:45,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:51:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-05-21 15:51:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-05-21 15:51:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.746355685131195) internal successors, (8478), 3087 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-05-21 15:51:45,221 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-05-21 15:51:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:45,222 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-05-21 15:51:45,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-05-21 15:51:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:45,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:45,224 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:45,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:45,424 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1140168531, now seen corresponding path program 190 times [2021-05-21 15:51:45,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:45,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726596801] [2021-05-21 15:51:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:45,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:45,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726596801] [2021-05-21 15:51:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726596801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821132856] [2021-05-21 15:51:45,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:45,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:45,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821132856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:45,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:45,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:45,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349831663] [2021-05-21 15:51:45,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:45,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:45,784 INFO L87 Difference]: Start difference. First operand 3088 states and 8478 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:46,171 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-05-21 15:51:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:51:46,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:46,175 INFO L225 Difference]: With dead ends: 4756 [2021-05-21 15:51:46,176 INFO L226 Difference]: Without dead ends: 4486 [2021-05-21 15:51:46,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:51:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-05-21 15:51:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-05-21 15:51:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.752371916508539) internal successors, (8703), 3162 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-05-21 15:51:46,208 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-05-21 15:51:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:46,208 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-05-21 15:51:46,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-05-21 15:51:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:46,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:46,210 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:46,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:46,410 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1520612483, now seen corresponding path program 191 times [2021-05-21 15:51:46,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:46,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449951702] [2021-05-21 15:51:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:46,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:46,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449951702] [2021-05-21 15:51:46,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449951702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:46,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301498038] [2021-05-21 15:51:46,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:46,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:51:46,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:46,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301498038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:46,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:46,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:46,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237660069] [2021-05-21 15:51:46,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:46,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:46,810 INFO L87 Difference]: Start difference. First operand 3163 states and 8703 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:47,338 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-05-21 15:51:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:51:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:47,342 INFO L225 Difference]: With dead ends: 4781 [2021-05-21 15:51:47,342 INFO L226 Difference]: Without dead ends: 4511 [2021-05-21 15:51:47,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:51:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-05-21 15:51:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-05-21 15:51:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7581093605189992) internal successors, (8928), 3237 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-05-21 15:51:47,374 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-05-21 15:51:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:47,374 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-05-21 15:51:47,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-05-21 15:51:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:47,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:47,376 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:47,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-21 15:51:47,576 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash -896237333, now seen corresponding path program 192 times [2021-05-21 15:51:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:47,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899369335] [2021-05-21 15:51:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:47,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:47,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899369335] [2021-05-21 15:51:47,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899369335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:47,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471553246] [2021-05-21 15:51:47,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:47,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:51:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:47,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471553246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:47,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:47,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004438867] [2021-05-21 15:51:47,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:47,935 INFO L87 Difference]: Start difference. First operand 3238 states and 8928 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:48,352 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-05-21 15:51:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:51:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:48,356 INFO L225 Difference]: With dead ends: 4806 [2021-05-21 15:51:48,356 INFO L226 Difference]: Without dead ends: 4536 [2021-05-21 15:51:48,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:51:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-05-21 15:51:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-05-21 15:51:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7635869565217392) internal successors, (9153), 3312 states have internal predecessors, (9153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-05-21 15:51:48,389 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-05-21 15:51:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:48,390 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-05-21 15:51:48,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-05-21 15:51:48,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:48,392 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:48,392 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:48,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-21 15:51:48,592 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -87185477, now seen corresponding path program 193 times [2021-05-21 15:51:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:48,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692831885] [2021-05-21 15:51:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:48,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692831885] [2021-05-21 15:51:48,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692831885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636175017] [2021-05-21 15:51:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:48,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636175017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:48,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:48,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178114098] [2021-05-21 15:51:48,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:48,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:48,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:48,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:48,962 INFO L87 Difference]: Start difference. First operand 3313 states and 9153 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:49,501 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-05-21 15:51:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:51:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:49,506 INFO L225 Difference]: With dead ends: 4831 [2021-05-21 15:51:49,506 INFO L226 Difference]: Without dead ends: 4561 [2021-05-21 15:51:49,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:51:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-05-21 15:51:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-05-21 15:51:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7688219663418954) internal successors, (9378), 3387 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-05-21 15:51:49,540 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-05-21 15:51:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:49,541 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-05-21 15:51:49,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-05-21 15:51:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:49,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:49,543 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:49,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-21 15:51:49,744 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:49,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:49,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1479135575, now seen corresponding path program 194 times [2021-05-21 15:51:49,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:49,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697387297] [2021-05-21 15:51:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:49,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:49,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697387297] [2021-05-21 15:51:49,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697387297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:49,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631440166] [2021-05-21 15:51:49,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:49,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:49,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:50,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631440166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:50,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:50,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493894025] [2021-05-21 15:51:50,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:50,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:50,105 INFO L87 Difference]: Start difference. First operand 3388 states and 9378 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:50,610 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-05-21 15:51:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:51:50,610 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:50,614 INFO L225 Difference]: With dead ends: 4856 [2021-05-21 15:51:50,615 INFO L226 Difference]: Without dead ends: 4586 [2021-05-21 15:51:50,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:51:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-05-21 15:51:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-05-21 15:51:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7738301559792027) internal successors, (9603), 3462 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-05-21 15:51:50,650 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-05-21 15:51:50,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:50,650 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-05-21 15:51:50,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-05-21 15:51:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:50,653 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:50,653 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:50,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-21 15:51:50,854 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1724212871, now seen corresponding path program 195 times [2021-05-21 15:51:50,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:50,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793714978] [2021-05-21 15:51:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:51,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:51,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793714978] [2021-05-21 15:51:51,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793714978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:51,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055361788] [2021-05-21 15:51:51,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:51,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:51:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:51,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055361788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:51,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:51,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:51,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795399050] [2021-05-21 15:51:51,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:51,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:51,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:51,224 INFO L87 Difference]: Start difference. First operand 3463 states and 9603 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:51,810 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-05-21 15:51:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:51:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:51,815 INFO L225 Difference]: With dead ends: 4881 [2021-05-21 15:51:51,815 INFO L226 Difference]: Without dead ends: 4611 [2021-05-21 15:51:51,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:51:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-05-21 15:51:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-05-21 15:51:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.7786259541984735) internal successors, (9828), 3537 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-05-21 15:51:51,851 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-05-21 15:51:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:51,851 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-05-21 15:51:51,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-05-21 15:51:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:51,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:51,854 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:52,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:52,054 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2101063193, now seen corresponding path program 196 times [2021-05-21 15:51:52,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:52,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383538511] [2021-05-21 15:51:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:52,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:52,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383538511] [2021-05-21 15:51:52,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383538511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:52,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281664285] [2021-05-21 15:51:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:52,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:52,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281664285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:52,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:52,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:52,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069635313] [2021-05-21 15:51:52,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:52,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:52,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:52,441 INFO L87 Difference]: Start difference. First operand 3538 states and 9828 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:52,941 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-05-21 15:51:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:51:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:52,946 INFO L225 Difference]: With dead ends: 4906 [2021-05-21 15:51:52,946 INFO L226 Difference]: Without dead ends: 4636 [2021-05-21 15:51:52,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:51:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-05-21 15:51:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-05-21 15:51:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7832225913621262) internal successors, (10053), 3612 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-05-21 15:51:52,986 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-05-21 15:51:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:52,986 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-05-21 15:51:52,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-05-21 15:51:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:52,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:52,989 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:53,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-05-21 15:51:53,189 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash -774307657, now seen corresponding path program 197 times [2021-05-21 15:51:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:53,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982567954] [2021-05-21 15:51:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:53,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982567954] [2021-05-21 15:51:53,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982567954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174939689] [2021-05-21 15:51:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:53,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:51:53,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:53,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174939689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658732524] [2021-05-21 15:51:53,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:53,535 INFO L87 Difference]: Start difference. First operand 3613 states and 10053 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:54,175 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-05-21 15:51:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:51:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:54,180 INFO L225 Difference]: With dead ends: 4931 [2021-05-21 15:51:54,180 INFO L226 Difference]: Without dead ends: 4661 [2021-05-21 15:51:54,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:51:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-05-21 15:51:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-05-21 15:51:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.787632221318145) internal successors, (10278), 3687 states have internal predecessors, (10278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-05-21 15:51:54,217 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-05-21 15:51:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:54,217 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-05-21 15:51:54,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-05-21 15:51:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:54,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:54,220 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:54,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:54,420 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -320091483, now seen corresponding path program 198 times [2021-05-21 15:51:54,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:54,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828045649] [2021-05-21 15:51:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:54,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:54,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828045649] [2021-05-21 15:51:54,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828045649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:54,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93150100] [2021-05-21 15:51:54,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:54,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:51:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:54,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93150100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:54,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:54,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:54,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028830579] [2021-05-21 15:51:54,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:54,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:54,767 INFO L87 Difference]: Start difference. First operand 3688 states and 10278 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:55,309 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-05-21 15:51:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:51:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:55,314 INFO L225 Difference]: With dead ends: 4956 [2021-05-21 15:51:55,314 INFO L226 Difference]: Without dead ends: 4686 [2021-05-21 15:51:55,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:51:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-05-21 15:51:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-05-21 15:51:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.791866028708134) internal successors, (10503), 3762 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-05-21 15:51:55,367 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-05-21 15:51:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:55,367 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-05-21 15:51:55,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-05-21 15:51:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:55,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:55,370 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:55,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-05-21 15:51:55,571 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash 678804853, now seen corresponding path program 199 times [2021-05-21 15:51:55,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:55,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196369673] [2021-05-21 15:51:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:55,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196369673] [2021-05-21 15:51:55,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196369673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013722925] [2021-05-21 15:51:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:55,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013722925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:55,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:55,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:55,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266013437] [2021-05-21 15:51:55,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:55,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:55,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:55,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:55,903 INFO L87 Difference]: Start difference. First operand 3763 states and 10503 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:56,614 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-05-21 15:51:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:51:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:56,619 INFO L225 Difference]: With dead ends: 4981 [2021-05-21 15:51:56,619 INFO L226 Difference]: Without dead ends: 4711 [2021-05-21 15:51:56,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 665.7ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:51:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-05-21 15:51:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-05-21 15:51:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7959343236903833) internal successors, (10728), 3837 states have internal predecessors, (10728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-05-21 15:51:56,663 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-05-21 15:51:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:56,663 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-05-21 15:51:56,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-05-21 15:51:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:56,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:56,666 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:56,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:56,866 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1200523037, now seen corresponding path program 200 times [2021-05-21 15:51:56,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:56,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731288510] [2021-05-21 15:51:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:57,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731288510] [2021-05-21 15:51:57,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731288510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82091851] [2021-05-21 15:51:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:57,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:51:57,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:57,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:57,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82091851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:57,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:57,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:57,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603782973] [2021-05-21 15:51:57,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:57,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:57,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:57,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:57,206 INFO L87 Difference]: Start difference. First operand 3838 states and 10728 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:57,801 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-05-21 15:51:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:51:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:57,806 INFO L225 Difference]: With dead ends: 5006 [2021-05-21 15:51:57,807 INFO L226 Difference]: Without dead ends: 4736 [2021-05-21 15:51:57,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:51:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-05-21 15:51:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-05-21 15:51:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7998466257668713) internal successors, (10953), 3912 states have internal predecessors, (10953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-05-21 15:51:57,851 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-05-21 15:51:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:57,851 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-05-21 15:51:57,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-05-21 15:51:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:57,854 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:57,854 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:58,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:58,055 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 829796275, now seen corresponding path program 201 times [2021-05-21 15:51:58,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:58,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289909986] [2021-05-21 15:51:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:58,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289909986] [2021-05-21 15:51:58,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289909986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111650447] [2021-05-21 15:51:58,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:58,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:51:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111650447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:58,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:58,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:51:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982881964] [2021-05-21 15:51:58,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:51:58,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:51:58,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:51:58,399 INFO L87 Difference]: Start difference. First operand 3913 states and 10953 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:51:59,154 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-05-21 15:51:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:51:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:51:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:51:59,159 INFO L225 Difference]: With dead ends: 5031 [2021-05-21 15:51:59,159 INFO L226 Difference]: Without dead ends: 4761 [2021-05-21 15:51:59,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 698.6ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:51:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-05-21 15:51:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-05-21 15:51:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.8036117381489842) internal successors, (11178), 3987 states have internal predecessors, (11178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-05-21 15:51:59,198 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-05-21 15:51:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:51:59,198 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-05-21 15:51:59,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:51:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-05-21 15:51:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:51:59,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:51:59,201 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:51:59,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:59,402 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:51:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:51:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1444035745, now seen corresponding path program 202 times [2021-05-21 15:51:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:51:59,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402242518] [2021-05-21 15:51:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:51:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:51:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:59,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:51:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402242518] [2021-05-21 15:51:59,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402242518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962272008] [2021-05-21 15:51:59,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:51:59,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:51:59,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:51:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:51:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:51:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:51:59,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962272008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:51:59,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:51:59,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:51:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398879258] [2021-05-21 15:51:59,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:51:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:51:59,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:51:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:51:59,718 INFO L87 Difference]: Start difference. First operand 3988 states and 11178 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:00,302 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-05-21 15:52:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:52:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:52:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:00,307 INFO L225 Difference]: With dead ends: 5056 [2021-05-21 15:52:00,307 INFO L226 Difference]: Without dead ends: 4786 [2021-05-21 15:52:00,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:52:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-05-21 15:52:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-05-21 15:52:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.807237813884786) internal successors, (11403), 4062 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-05-21 15:52:00,361 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-05-21 15:52:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:00,361 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-05-21 15:52:00,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-05-21 15:52:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:52:00,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:00,364 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:00,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-21 15:52:00,564 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -271206543, now seen corresponding path program 203 times [2021-05-21 15:52:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452655924] [2021-05-21 15:52:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:00,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452655924] [2021-05-21 15:52:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452655924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907035463] [2021-05-21 15:52:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:00,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:52:00,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:52:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:00,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907035463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:00,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:00,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-05-21 15:52:00,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040884574] [2021-05-21 15:52:00,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:00,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:00,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:00,900 INFO L87 Difference]: Start difference. First operand 4063 states and 11403 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:01,645 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-05-21 15:52:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:52:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:52:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:01,650 INFO L225 Difference]: With dead ends: 5141 [2021-05-21 15:52:01,650 INFO L226 Difference]: Without dead ends: 4871 [2021-05-21 15:52:01,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:52:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-05-21 15:52:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-05-21 15:52:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-05-21 15:52:01,691 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-05-21 15:52:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:01,691 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-05-21 15:52:01,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-05-21 15:52:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:52:01,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:01,694 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-21 15:52:01,895 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1303854145, now seen corresponding path program 204 times [2021-05-21 15:52:01,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:01,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922768667] [2021-05-21 15:52:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:02,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:02,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922768667] [2021-05-21 15:52:02,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922768667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:02,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409023237] [2021-05-21 15:52:02,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:02,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:52:02,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:02,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409023237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:02,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:02,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-05-21 15:52:02,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929607850] [2021-05-21 15:52:02,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:52:02,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:02,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:52:02,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:52:02,231 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:02,849 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-05-21 15:52:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:52:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:52:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:02,855 INFO L225 Difference]: With dead ends: 5908 [2021-05-21 15:52:02,855 INFO L226 Difference]: Without dead ends: 5638 [2021-05-21 15:52:02,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:52:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-05-21 15:52:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-05-21 15:52:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-05-21 15:52:02,898 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-05-21 15:52:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:02,898 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-05-21 15:52:02,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-05-21 15:52:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:52:02,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:02,901 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:03,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-21 15:52:03,102 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:03,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1281510895, now seen corresponding path program 205 times [2021-05-21 15:52:03,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:03,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644633805] [2021-05-21 15:52:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:03,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:03,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644633805] [2021-05-21 15:52:03,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644633805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:03,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672860641] [2021-05-21 15:52:03,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:52:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:03,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672860641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:03,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:03,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-05-21 15:52:03,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470631385] [2021-05-21 15:52:03,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:03,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:03,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:03,441 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:04,319 INFO L93 Difference]: Finished difference Result 5851 states and 15841 transitions. [2021-05-21 15:52:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:52:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-05-21 15:52:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:04,325 INFO L225 Difference]: With dead ends: 5851 [2021-05-21 15:52:04,325 INFO L226 Difference]: Without dead ends: 5276 [2021-05-21 15:52:04,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 817.9ms TimeCoverageRelationStatistics Valid=1449, Invalid=3953, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:52:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-05-21 15:52:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-05-21 15:52:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:04,369 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 130 [2021-05-21 15:52:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:04,369 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:04,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:04,372 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:04,372 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:04,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-21 15:52:04,573 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1365615058, now seen corresponding path program 206 times [2021-05-21 15:52:04,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:04,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874052883] [2021-05-21 15:52:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:04,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874052883] [2021-05-21 15:52:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874052883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068537177] [2021-05-21 15:52:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:04,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:04,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:04,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:04,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068537177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:04,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:04,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987049744] [2021-05-21 15:52:04,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:04,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:04,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:04,965 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:05,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:05,388 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-05-21 15:52:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:52:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:05,393 INFO L225 Difference]: With dead ends: 5696 [2021-05-21 15:52:05,393 INFO L226 Difference]: Without dead ends: 5426 [2021-05-21 15:52:05,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:52:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-05-21 15:52:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-05-21 15:52:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:05,438 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:05,439 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:05,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:05,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:05,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:05,442 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:05,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-21 15:52:05,642 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:05,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1066754, now seen corresponding path program 207 times [2021-05-21 15:52:05,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:05,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745454617] [2021-05-21 15:52:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:05,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:05,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745454617] [2021-05-21 15:52:05,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745454617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:05,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63711678] [2021-05-21 15:52:05,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:05,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:52:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:05,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:06,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63711678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:06,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:06,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:06,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640096321] [2021-05-21 15:52:06,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:06,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:06,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:06,060 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:06,497 INFO L93 Difference]: Finished difference Result 6141 states and 15987 transitions. [2021-05-21 15:52:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:52:06,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:06,503 INFO L225 Difference]: With dead ends: 6141 [2021-05-21 15:52:06,503 INFO L226 Difference]: Without dead ends: 5871 [2021-05-21 15:52:06,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=743, Invalid=2227, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:52:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2021-05-21 15:52:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 4353. [2021-05-21 15:52:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:06,552 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:06,552 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:06,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:06,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:06,555 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:06,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:06,756 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:06,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2016668524, now seen corresponding path program 208 times [2021-05-21 15:52:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:06,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36949556] [2021-05-21 15:52:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:06,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36949556] [2021-05-21 15:52:06,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36949556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:06,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335637827] [2021-05-21 15:52:06,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:07,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:07,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:07,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:07,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335637827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:07,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:07,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:07,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171366833] [2021-05-21 15:52:07,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:07,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:07,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:07,165 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:07,575 INFO L93 Difference]: Finished difference Result 6096 states and 15897 transitions. [2021-05-21 15:52:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:52:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:07,581 INFO L225 Difference]: With dead ends: 6096 [2021-05-21 15:52:07,582 INFO L226 Difference]: Without dead ends: 5826 [2021-05-21 15:52:07,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=741, Invalid=2229, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:52:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-05-21 15:52:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4353. [2021-05-21 15:52:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:07,628 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:07,629 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:07,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:07,632 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:07,632 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:07,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-05-21 15:52:07,833 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1118145084, now seen corresponding path program 209 times [2021-05-21 15:52:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864503448] [2021-05-21 15:52:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:08,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864503448] [2021-05-21 15:52:08,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864503448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774242326] [2021-05-21 15:52:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:08,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:52:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:08,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774242326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:08,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:08,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:08,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781722685] [2021-05-21 15:52:08,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:08,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:08,236 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:08,751 INFO L93 Difference]: Finished difference Result 6046 states and 15797 transitions. [2021-05-21 15:52:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:52:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:08,756 INFO L225 Difference]: With dead ends: 6046 [2021-05-21 15:52:08,756 INFO L226 Difference]: Without dead ends: 5776 [2021-05-21 15:52:08,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=763, Invalid=2429, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:52:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-05-21 15:52:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4353. [2021-05-21 15:52:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:08,796 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:08,796 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:08,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:08,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:08,800 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:09,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:09,000 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash -496808406, now seen corresponding path program 210 times [2021-05-21 15:52:09,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:09,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505601957] [2021-05-21 15:52:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:09,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505601957] [2021-05-21 15:52:09,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505601957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447562847] [2021-05-21 15:52:09,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:09,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:52:09,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:09,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:09,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447562847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:09,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:09,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668389003] [2021-05-21 15:52:09,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:09,399 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:09,865 INFO L93 Difference]: Finished difference Result 5996 states and 15697 transitions. [2021-05-21 15:52:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:52:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:09,871 INFO L225 Difference]: With dead ends: 5996 [2021-05-21 15:52:09,871 INFO L226 Difference]: Without dead ends: 5726 [2021-05-21 15:52:09,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:52:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-05-21 15:52:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4353. [2021-05-21 15:52:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:09,911 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:09,911 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:09,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:09,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:09,915 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:10,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:10,115 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash -877252358, now seen corresponding path program 211 times [2021-05-21 15:52:10,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:10,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523153090] [2021-05-21 15:52:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:10,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523153090] [2021-05-21 15:52:10,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523153090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677298538] [2021-05-21 15:52:10,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677298538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:10,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:10,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:10,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013703077] [2021-05-21 15:52:10,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:10,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:10,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:10,545 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:11,074 INFO L93 Difference]: Finished difference Result 5946 states and 15597 transitions. [2021-05-21 15:52:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:52:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:11,080 INFO L225 Difference]: With dead ends: 5946 [2021-05-21 15:52:11,080 INFO L226 Difference]: Without dead ends: 5676 [2021-05-21 15:52:11,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:52:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-05-21 15:52:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4353. [2021-05-21 15:52:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:11,121 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:11,121 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:11,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:11,124 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:11,124 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:11,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:11,324 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -252877208, now seen corresponding path program 212 times [2021-05-21 15:52:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866364618] [2021-05-21 15:52:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:11,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866364618] [2021-05-21 15:52:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866364618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174623789] [2021-05-21 15:52:11,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:11,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:11,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:11,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174623789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:11,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:11,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:11,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117540803] [2021-05-21 15:52:11,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:11,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:11,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:11,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:11,679 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:12,165 INFO L93 Difference]: Finished difference Result 5896 states and 15497 transitions. [2021-05-21 15:52:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:52:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:12,171 INFO L225 Difference]: With dead ends: 5896 [2021-05-21 15:52:12,171 INFO L226 Difference]: Without dead ends: 5626 [2021-05-21 15:52:12,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:52:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-05-21 15:52:12,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4353. [2021-05-21 15:52:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:12,220 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:12,221 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:12,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:12,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:12,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:12,225 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:12,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:12,425 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash 556174648, now seen corresponding path program 213 times [2021-05-21 15:52:12,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:12,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455493869] [2021-05-21 15:52:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:12,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:12,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455493869] [2021-05-21 15:52:12,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455493869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:12,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126054508] [2021-05-21 15:52:12,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:12,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:52:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:12,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126054508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:12,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:12,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:12,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636416990] [2021-05-21 15:52:12,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:12,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:12,805 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:13,393 INFO L93 Difference]: Finished difference Result 5846 states and 15397 transitions. [2021-05-21 15:52:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:52:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:13,399 INFO L225 Difference]: With dead ends: 5846 [2021-05-21 15:52:13,399 INFO L226 Difference]: Without dead ends: 5576 [2021-05-21 15:52:13,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:52:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-05-21 15:52:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4353. [2021-05-21 15:52:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:13,446 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:13,446 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:13,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:13,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:13,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:13,450 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:13,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-21 15:52:13,650 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash -835775450, now seen corresponding path program 214 times [2021-05-21 15:52:13,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:13,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150068250] [2021-05-21 15:52:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:13,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:13,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150068250] [2021-05-21 15:52:13,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150068250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:13,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212195459] [2021-05-21 15:52:13,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:13,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:13,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:14,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212195459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:14,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:14,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010821251] [2021-05-21 15:52:14,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:14,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:14,017 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:14,585 INFO L93 Difference]: Finished difference Result 5796 states and 15297 transitions. [2021-05-21 15:52:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:52:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:14,591 INFO L225 Difference]: With dead ends: 5796 [2021-05-21 15:52:14,591 INFO L226 Difference]: Without dead ends: 5526 [2021-05-21 15:52:14,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 538.1ms TimeCoverageRelationStatistics Valid=891, Invalid=2769, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:52:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-05-21 15:52:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4353. [2021-05-21 15:52:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:14,637 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:14,638 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:14,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:14,641 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:14,641 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:14,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-21 15:52:14,841 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1080852746, now seen corresponding path program 215 times [2021-05-21 15:52:14,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:14,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552481953] [2021-05-21 15:52:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:15,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:15,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552481953] [2021-05-21 15:52:15,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552481953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:15,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750251917] [2021-05-21 15:52:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:15,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:52:15,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:15,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750251917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:15,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:15,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:15,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757425787] [2021-05-21 15:52:15,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:15,215 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:15,822 INFO L93 Difference]: Finished difference Result 5746 states and 15197 transitions. [2021-05-21 15:52:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:52:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:15,828 INFO L225 Difference]: With dead ends: 5746 [2021-05-21 15:52:15,828 INFO L226 Difference]: Without dead ends: 5476 [2021-05-21 15:52:15,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=919, Invalid=2987, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:52:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-05-21 15:52:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4353. [2021-05-21 15:52:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:15,875 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:15,875 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:15,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:15,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:15,879 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:16,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-21 15:52:16,085 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703068, now seen corresponding path program 216 times [2021-05-21 15:52:16,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:16,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376542551] [2021-05-21 15:52:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:16,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376542551] [2021-05-21 15:52:16,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376542551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321602513] [2021-05-21 15:52:16,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:16,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:52:16,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:16,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321602513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:16,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:16,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521620338] [2021-05-21 15:52:16,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:16,453 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:16,983 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-05-21 15:52:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:52:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:16,989 INFO L225 Difference]: With dead ends: 5696 [2021-05-21 15:52:16,989 INFO L226 Difference]: Without dead ends: 5426 [2021-05-21 15:52:16,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 543.3ms TimeCoverageRelationStatistics Valid=973, Invalid=2933, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:52:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-05-21 15:52:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-05-21 15:52:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:17,034 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:17,035 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:17,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:17,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:17,038 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:17,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-21 15:52:17,239 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:17,239 INFO L82 PathProgramCache]: Analyzing trace with hash -130947532, now seen corresponding path program 217 times [2021-05-21 15:52:17,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:17,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657851519] [2021-05-21 15:52:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:17,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657851519] [2021-05-21 15:52:17,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657851519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:17,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976174427] [2021-05-21 15:52:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:17,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976174427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:17,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:17,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136833865] [2021-05-21 15:52:17,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:17,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:17,597 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:18,269 INFO L93 Difference]: Finished difference Result 5646 states and 14997 transitions. [2021-05-21 15:52:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:52:18,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:18,275 INFO L225 Difference]: With dead ends: 5646 [2021-05-21 15:52:18,275 INFO L226 Difference]: Without dead ends: 5376 [2021-05-21 15:52:18,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:52:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-05-21 15:52:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4353. [2021-05-21 15:52:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:18,320 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:18,320 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:18,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:18,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:18,323 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:18,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:18,524 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:18,524 INFO L82 PathProgramCache]: Analyzing trace with hash 323268642, now seen corresponding path program 218 times [2021-05-21 15:52:18,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:18,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9308173] [2021-05-21 15:52:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:18,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9308173] [2021-05-21 15:52:18,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9308173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930417908] [2021-05-21 15:52:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:18,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:18,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930417908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:18,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:18,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:18,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833177045] [2021-05-21 15:52:18,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:18,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:18,857 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:19,419 INFO L93 Difference]: Finished difference Result 5596 states and 14897 transitions. [2021-05-21 15:52:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:52:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:19,424 INFO L225 Difference]: With dead ends: 5596 [2021-05-21 15:52:19,424 INFO L226 Difference]: Without dead ends: 5326 [2021-05-21 15:52:19,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=1071, Invalid=3089, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:52:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-05-21 15:52:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4353. [2021-05-21 15:52:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:19,463 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:19,463 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:19,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:19,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:19,466 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:19,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-21 15:52:19,667 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1322164978, now seen corresponding path program 219 times [2021-05-21 15:52:19,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:19,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404911263] [2021-05-21 15:52:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:19,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:19,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404911263] [2021-05-21 15:52:19,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404911263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:19,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965398008] [2021-05-21 15:52:19,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:19,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:52:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:20,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965398008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:20,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:20,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:20,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311451580] [2021-05-21 15:52:20,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:20,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:20,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:20,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:20,043 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:20,742 INFO L93 Difference]: Finished difference Result 5546 states and 14797 transitions. [2021-05-21 15:52:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:52:20,742 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:20,747 INFO L225 Difference]: With dead ends: 5546 [2021-05-21 15:52:20,747 INFO L226 Difference]: Without dead ends: 5276 [2021-05-21 15:52:20,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=1103, Invalid=3319, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:52:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-05-21 15:52:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-05-21 15:52:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:20,786 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:20,787 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:20,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:20,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:20,790 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:20,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:20,990 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:20,990 INFO L82 PathProgramCache]: Analyzing trace with hash -557162912, now seen corresponding path program 220 times [2021-05-21 15:52:20,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:20,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648377292] [2021-05-21 15:52:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:21,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648377292] [2021-05-21 15:52:21,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648377292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843293997] [2021-05-21 15:52:21,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:21,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:21,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843293997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:21,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:21,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:21,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630707661] [2021-05-21 15:52:21,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:21,332 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:21,920 INFO L93 Difference]: Finished difference Result 5496 states and 14697 transitions. [2021-05-21 15:52:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:52:21,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:21,925 INFO L225 Difference]: With dead ends: 5496 [2021-05-21 15:52:21,925 INFO L226 Difference]: Without dead ends: 5226 [2021-05-21 15:52:21,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=1185, Invalid=3237, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:52:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-05-21 15:52:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-05-21 15:52:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:21,978 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:21,979 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:21,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:21,982 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:21,982 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:22,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-21 15:52:22,182 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1473156400, now seen corresponding path program 221 times [2021-05-21 15:52:22,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:22,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295913002] [2021-05-21 15:52:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:22,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:22,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295913002] [2021-05-21 15:52:22,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295913002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:22,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868891671] [2021-05-21 15:52:22,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:22,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 15:52:22,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868891671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:22,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:22,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31865019] [2021-05-21 15:52:22,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:22,538 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:23,274 INFO L93 Difference]: Finished difference Result 5446 states and 14597 transitions. [2021-05-21 15:52:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:52:23,274 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:23,280 INFO L225 Difference]: With dead ends: 5446 [2021-05-21 15:52:23,280 INFO L226 Difference]: Without dead ends: 5176 [2021-05-21 15:52:23,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=1219, Invalid=3473, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:52:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-05-21 15:52:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4353. [2021-05-21 15:52:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:23,320 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:23,320 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:23,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:23,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:23,324 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:23,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:23,524 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2087395870, now seen corresponding path program 222 times [2021-05-21 15:52:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:23,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185050035] [2021-05-21 15:52:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:23,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185050035] [2021-05-21 15:52:23,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185050035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120670118] [2021-05-21 15:52:23,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:23,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-21 15:52:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:23,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120670118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:23,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:23,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49543423] [2021-05-21 15:52:23,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:23,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:23,872 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:24,529 INFO L93 Difference]: Finished difference Result 5396 states and 14497 transitions. [2021-05-21 15:52:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:52:24,530 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:24,535 INFO L225 Difference]: With dead ends: 5396 [2021-05-21 15:52:24,535 INFO L226 Difference]: Without dead ends: 5126 [2021-05-21 15:52:24,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=3377, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:52:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-05-21 15:52:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4353. [2021-05-21 15:52:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-05-21 15:52:24,578 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-05-21 15:52:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:24,578 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-05-21 15:52:24,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-05-21 15:52:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:24,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:24,581 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:24,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:24,782 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash 372153582, now seen corresponding path program 223 times [2021-05-21 15:52:24,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:24,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689493287] [2021-05-21 15:52:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:24,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689493287] [2021-05-21 15:52:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689493287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428265874] [2021-05-21 15:52:24,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:25,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428265874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:25,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:25,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-05-21 15:52:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133376893] [2021-05-21 15:52:25,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:52:25,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:52:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:52:25,136 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:25,927 INFO L93 Difference]: Finished difference Result 5406 states and 14547 transitions. [2021-05-21 15:52:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:52:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:25,933 INFO L225 Difference]: With dead ends: 5406 [2021-05-21 15:52:25,933 INFO L226 Difference]: Without dead ends: 5136 [2021-05-21 15:52:25,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=1351, Invalid=3619, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:52:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-05-21 15:52:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 4353. [2021-05-21 15:52:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.823529411764706) internal successors, (12288), 4352 states have internal predecessors, (12288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12288 transitions. [2021-05-21 15:52:25,989 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12288 transitions. Word has length 135 [2021-05-21 15:52:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:25,989 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12288 transitions. [2021-05-21 15:52:25,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12288 transitions. [2021-05-21 15:52:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:25,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:25,993 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:26,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:26,193 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash -660494020, now seen corresponding path program 224 times [2021-05-21 15:52:26,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:26,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378960426] [2021-05-21 15:52:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:26,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:26,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378960426] [2021-05-21 15:52:26,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378960426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:26,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528530158] [2021-05-21 15:52:26,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:26,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:26,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528530158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:26,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:26,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-05-21 15:52:26,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204398107] [2021-05-21 15:52:26,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:52:26,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:52:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:52:26,542 INFO L87 Difference]: Start difference. First operand 4353 states and 12288 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:27,197 INFO L93 Difference]: Finished difference Result 6148 states and 16671 transitions. [2021-05-21 15:52:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:52:27,198 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:27,203 INFO L225 Difference]: With dead ends: 6148 [2021-05-21 15:52:27,203 INFO L226 Difference]: Without dead ends: 5878 [2021-05-21 15:52:27,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 623.2ms TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:52:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-05-21 15:52:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4533. [2021-05-21 15:52:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 2.834730803177405) internal successors, (12847), 4532 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 12847 transitions. [2021-05-21 15:52:27,254 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 12847 transitions. Word has length 135 [2021-05-21 15:52:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:27,254 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 12847 transitions. [2021-05-21 15:52:27,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 12847 transitions. [2021-05-21 15:52:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-21 15:52:27,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:27,258 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:27,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:27,458 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash -638150770, now seen corresponding path program 225 times [2021-05-21 15:52:27,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:27,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009041807] [2021-05-21 15:52:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:27,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009041807] [2021-05-21 15:52:27,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009041807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159527662] [2021-05-21 15:52:27,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:27,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-21 15:52:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:52:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:27,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159527662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:27,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:27,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-05-21 15:52:27,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128713810] [2021-05-21 15:52:27,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:27,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:27,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:27,823 INFO L87 Difference]: Start difference. First operand 4533 states and 12847 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:28,693 INFO L93 Difference]: Finished difference Result 6016 states and 16336 transitions. [2021-05-21 15:52:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:52:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-05-21 15:52:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:28,699 INFO L225 Difference]: With dead ends: 6016 [2021-05-21 15:52:28,699 INFO L226 Difference]: Without dead ends: 5441 [2021-05-21 15:52:28,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 828.7ms TimeCoverageRelationStatistics Valid=1574, Invalid=4278, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:52:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5441 states. [2021-05-21 15:52:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5441 to 2924. [2021-05-21 15:52:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.738966814916182) internal successors, (8006), 2923 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 8006 transitions. [2021-05-21 15:52:28,730 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 8006 transitions. Word has length 135 [2021-05-21 15:52:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:28,730 INFO L482 AbstractCegarLoop]: Abstraction has 2924 states and 8006 transitions. [2021-05-21 15:52:28,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 8006 transitions. [2021-05-21 15:52:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:28,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:28,732 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:28,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-21 15:52:28,941 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2057178814, now seen corresponding path program 226 times [2021-05-21 15:52:28,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:28,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855169179] [2021-05-21 15:52:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:29,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855169179] [2021-05-21 15:52:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855169179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090462253] [2021-05-21 15:52:29,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:29,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:29,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:52:29,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:29,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090462253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:29,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:29,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-05-21 15:52:29,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197765833] [2021-05-21 15:52:29,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:52:29,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:29,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:52:29,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:52:29,379 INFO L87 Difference]: Start difference. First operand 2924 states and 8006 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:29,816 INFO L93 Difference]: Finished difference Result 4114 states and 10706 transitions. [2021-05-21 15:52:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:52:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:29,820 INFO L225 Difference]: With dead ends: 4114 [2021-05-21 15:52:29,820 INFO L226 Difference]: Without dead ends: 3780 [2021-05-21 15:52:29,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:52:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-05-21 15:52:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3009. [2021-05-21 15:52:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.7180851063829787) internal successors, (8176), 3008 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8176 transitions. [2021-05-21 15:52:29,847 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8176 transitions. Word has length 140 [2021-05-21 15:52:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:29,847 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8176 transitions. [2021-05-21 15:52:29,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8176 transitions. [2021-05-21 15:52:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:29,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:29,863 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:30,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-21 15:52:30,063 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash -416801150, now seen corresponding path program 227 times [2021-05-21 15:52:30,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:30,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744211864] [2021-05-21 15:52:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:30,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:30,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744211864] [2021-05-21 15:52:30,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744211864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:30,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459552531] [2021-05-21 15:52:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:30,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:52:30,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:30,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459552531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:30,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:30,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268336001] [2021-05-21 15:52:30,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:30,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:30,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:30,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:30,499 INFO L87 Difference]: Start difference. First operand 3009 states and 8176 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:30,869 INFO L93 Difference]: Finished difference Result 5136 states and 12687 transitions. [2021-05-21 15:52:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:52:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:30,873 INFO L225 Difference]: With dead ends: 5136 [2021-05-21 15:52:30,874 INFO L226 Difference]: Without dead ends: 4866 [2021-05-21 15:52:30,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:52:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-05-21 15:52:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3153. [2021-05-21 15:52:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7262055837563453) internal successors, (8593), 3152 states have internal predecessors, (8593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8593 transitions. [2021-05-21 15:52:30,904 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8593 transitions. Word has length 140 [2021-05-21 15:52:30,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:30,905 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8593 transitions. [2021-05-21 15:52:30,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8593 transitions. [2021-05-21 15:52:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:30,907 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:30,907 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:31,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-21 15:52:31,107 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1293535918, now seen corresponding path program 228 times [2021-05-21 15:52:31,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:31,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133959557] [2021-05-21 15:52:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:31,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:31,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133959557] [2021-05-21 15:52:31,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133959557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:31,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697789269] [2021-05-21 15:52:31,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:31,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:52:31,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:31,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697789269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:31,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:31,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:31,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249290891] [2021-05-21 15:52:31,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:31,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:31,557 INFO L87 Difference]: Start difference. First operand 3153 states and 8593 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:32,000 INFO L93 Difference]: Finished difference Result 5096 states and 12682 transitions. [2021-05-21 15:52:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:52:32,000 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:32,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:32,003 INFO L225 Difference]: With dead ends: 5096 [2021-05-21 15:52:32,003 INFO L226 Difference]: Without dead ends: 4826 [2021-05-21 15:52:32,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:52:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-05-21 15:52:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 3228. [2021-05-21 15:52:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.732568949488689) internal successors, (8818), 3227 states have internal predecessors, (8818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8818 transitions. [2021-05-21 15:52:32,033 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8818 transitions. Word has length 140 [2021-05-21 15:52:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:32,033 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8818 transitions. [2021-05-21 15:52:32,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8818 transitions. [2021-05-21 15:52:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:32,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:32,035 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:32,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:32,236 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1264105024, now seen corresponding path program 229 times [2021-05-21 15:52:32,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:32,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82106895] [2021-05-21 15:52:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:32,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82106895] [2021-05-21 15:52:32,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82106895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:32,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504832760] [2021-05-21 15:52:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504832760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:32,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:32,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815547993] [2021-05-21 15:52:32,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:32,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:32,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:32,649 INFO L87 Difference]: Start difference. First operand 3228 states and 8818 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:33,048 INFO L93 Difference]: Finished difference Result 5146 states and 12857 transitions. [2021-05-21 15:52:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:52:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:33,053 INFO L225 Difference]: With dead ends: 5146 [2021-05-21 15:52:33,053 INFO L226 Difference]: Without dead ends: 4876 [2021-05-21 15:52:33,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:52:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-05-21 15:52:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3303. [2021-05-21 15:52:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.7386432465172623) internal successors, (9043), 3302 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9043 transitions. [2021-05-21 15:52:33,086 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9043 transitions. Word has length 140 [2021-05-21 15:52:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:33,086 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9043 transitions. [2021-05-21 15:52:33,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9043 transitions. [2021-05-21 15:52:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:33,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:33,089 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:33,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-05-21 15:52:33,289 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1666313968, now seen corresponding path program 230 times [2021-05-21 15:52:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:33,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431232743] [2021-05-21 15:52:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:33,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431232743] [2021-05-21 15:52:33,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431232743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183211654] [2021-05-21 15:52:33,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:33,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183211654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:33,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031000869] [2021-05-21 15:52:33,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:33,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:33,739 INFO L87 Difference]: Start difference. First operand 3303 states and 9043 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:34,241 INFO L93 Difference]: Finished difference Result 5171 states and 12982 transitions. [2021-05-21 15:52:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:52:34,241 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:34,246 INFO L225 Difference]: With dead ends: 5171 [2021-05-21 15:52:34,246 INFO L226 Difference]: Without dead ends: 4901 [2021-05-21 15:52:34,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:52:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-05-21 15:52:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3378. [2021-05-21 15:52:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.744447734675748) internal successors, (9268), 3377 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9268 transitions. [2021-05-21 15:52:34,282 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9268 transitions. Word has length 140 [2021-05-21 15:52:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:34,283 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9268 transitions. [2021-05-21 15:52:34,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9268 transitions. [2021-05-21 15:52:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:34,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:34,285 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:34,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:34,486 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash 351421310, now seen corresponding path program 231 times [2021-05-21 15:52:34,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:34,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098718213] [2021-05-21 15:52:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:34,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098718213] [2021-05-21 15:52:34,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098718213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:34,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147584776] [2021-05-21 15:52:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:34,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:52:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:34,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:34,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147584776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:34,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:34,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077351780] [2021-05-21 15:52:34,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:34,897 INFO L87 Difference]: Start difference. First operand 3378 states and 9268 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:35,334 INFO L93 Difference]: Finished difference Result 5196 states and 13107 transitions. [2021-05-21 15:52:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:52:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:35,339 INFO L225 Difference]: With dead ends: 5196 [2021-05-21 15:52:35,340 INFO L226 Difference]: Without dead ends: 4926 [2021-05-21 15:52:35,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:52:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-05-21 15:52:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 3453. [2021-05-21 15:52:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.75) internal successors, (9493), 3452 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9493 transitions. [2021-05-21 15:52:35,378 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9493 transitions. Word has length 140 [2021-05-21 15:52:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:35,378 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9493 transitions. [2021-05-21 15:52:35,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9493 transitions. [2021-05-21 15:52:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:35,381 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:35,381 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:35,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-05-21 15:52:35,582 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:35,582 INFO L82 PathProgramCache]: Analyzing trace with hash -547102130, now seen corresponding path program 232 times [2021-05-21 15:52:35,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:35,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924080153] [2021-05-21 15:52:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:35,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924080153] [2021-05-21 15:52:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924080153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533517334] [2021-05-21 15:52:35,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:35,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:35,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:35,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533517334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:36,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:36,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945769556] [2021-05-21 15:52:36,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:36,024 INFO L87 Difference]: Start difference. First operand 3453 states and 9493 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:36,554 INFO L93 Difference]: Finished difference Result 5221 states and 13232 transitions. [2021-05-21 15:52:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:52:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:36,559 INFO L225 Difference]: With dead ends: 5221 [2021-05-21 15:52:36,559 INFO L226 Difference]: Without dead ends: 4951 [2021-05-21 15:52:36,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:52:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-05-21 15:52:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3528. [2021-05-21 15:52:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.755316132690672) internal successors, (9718), 3527 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9718 transitions. [2021-05-21 15:52:36,593 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9718 transitions. Word has length 140 [2021-05-21 15:52:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:36,594 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9718 transitions. [2021-05-21 15:52:36,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9718 transitions. [2021-05-21 15:52:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:36,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:36,596 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:36,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:36,797 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2132911676, now seen corresponding path program 233 times [2021-05-21 15:52:36,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:36,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964068157] [2021-05-21 15:52:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:37,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964068157] [2021-05-21 15:52:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964068157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882409157] [2021-05-21 15:52:37,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:37,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:52:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882409157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:37,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:37,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:37,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157849562] [2021-05-21 15:52:37,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:37,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:37,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:37,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:37,212 INFO L87 Difference]: Start difference. First operand 3528 states and 9718 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:37,681 INFO L93 Difference]: Finished difference Result 5246 states and 13357 transitions. [2021-05-21 15:52:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:52:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:37,686 INFO L225 Difference]: With dead ends: 5246 [2021-05-21 15:52:37,686 INFO L226 Difference]: Without dead ends: 4976 [2021-05-21 15:52:37,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:52:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-05-21 15:52:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3603. [2021-05-21 15:52:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.7604108828428653) internal successors, (9943), 3602 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9943 transitions. [2021-05-21 15:52:37,723 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9943 transitions. Word has length 140 [2021-05-21 15:52:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:37,723 INFO L482 AbstractCegarLoop]: Abstraction has 3603 states and 9943 transitions. [2021-05-21 15:52:37,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9943 transitions. [2021-05-21 15:52:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:37,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:37,742 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:37,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:37,943 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1752467724, now seen corresponding path program 234 times [2021-05-21 15:52:37,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:37,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065852636] [2021-05-21 15:52:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:38,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065852636] [2021-05-21 15:52:38,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065852636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424153438] [2021-05-21 15:52:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:38,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:52:38,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:38,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424153438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:38,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:38,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:38,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265195008] [2021-05-21 15:52:38,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:38,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:38,366 INFO L87 Difference]: Start difference. First operand 3603 states and 9943 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:38,965 INFO L93 Difference]: Finished difference Result 5271 states and 13482 transitions. [2021-05-21 15:52:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:52:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:38,970 INFO L225 Difference]: With dead ends: 5271 [2021-05-21 15:52:38,970 INFO L226 Difference]: Without dead ends: 5001 [2021-05-21 15:52:38,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:52:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-05-21 15:52:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3678. [2021-05-21 15:52:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.7652977971172152) internal successors, (10168), 3677 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 10168 transitions. [2021-05-21 15:52:39,008 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 10168 transitions. Word has length 140 [2021-05-21 15:52:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:39,008 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 10168 transitions. [2021-05-21 15:52:39,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 10168 transitions. [2021-05-21 15:52:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:39,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:39,011 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:39,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:39,212 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1918124422, now seen corresponding path program 235 times [2021-05-21 15:52:39,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:39,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390303701] [2021-05-21 15:52:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:39,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:39,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390303701] [2021-05-21 15:52:39,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390303701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:39,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673673789] [2021-05-21 15:52:39,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:39,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673673789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:39,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:39,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:39,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476947442] [2021-05-21 15:52:39,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:39,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:39,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:39,602 INFO L87 Difference]: Start difference. First operand 3678 states and 10168 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:40,107 INFO L93 Difference]: Finished difference Result 5296 states and 13607 transitions. [2021-05-21 15:52:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:52:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:40,112 INFO L225 Difference]: With dead ends: 5296 [2021-05-21 15:52:40,112 INFO L226 Difference]: Without dead ends: 5026 [2021-05-21 15:52:40,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:52:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-05-21 15:52:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3753. [2021-05-21 15:52:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 2.76998933901919) internal successors, (10393), 3752 states have internal predecessors, (10393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 10393 transitions. [2021-05-21 15:52:40,149 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 10393 transitions. Word has length 140 [2021-05-21 15:52:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:40,149 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 10393 transitions. [2021-05-21 15:52:40,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 10393 transitions. [2021-05-21 15:52:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:40,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:40,152 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:40,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-21 15:52:40,353 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1109072566, now seen corresponding path program 236 times [2021-05-21 15:52:40,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504231280] [2021-05-21 15:52:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:40,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:40,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504231280] [2021-05-21 15:52:40,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504231280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:40,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76818285] [2021-05-21 15:52:40,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:40,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:40,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:40,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:40,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76818285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:40,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:40,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:40,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192023637] [2021-05-21 15:52:40,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:40,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:40,754 INFO L87 Difference]: Start difference. First operand 3753 states and 10393 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:41,376 INFO L93 Difference]: Finished difference Result 5321 states and 13732 transitions. [2021-05-21 15:52:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:52:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:41,381 INFO L225 Difference]: With dead ends: 5321 [2021-05-21 15:52:41,381 INFO L226 Difference]: Without dead ends: 5051 [2021-05-21 15:52:41,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:52:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-05-21 15:52:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3828. [2021-05-21 15:52:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.7744969950352756) internal successors, (10618), 3827 states have internal predecessors, (10618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 10618 transitions. [2021-05-21 15:52:41,421 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 10618 transitions. Word has length 140 [2021-05-21 15:52:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:41,421 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 10618 transitions. [2021-05-21 15:52:41,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 10618 transitions. [2021-05-21 15:52:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:41,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:41,424 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:41,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-05-21 15:52:41,624 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1793944632, now seen corresponding path program 237 times [2021-05-21 15:52:41,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:41,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249838887] [2021-05-21 15:52:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:41,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:41,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249838887] [2021-05-21 15:52:41,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249838887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:41,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35986977] [2021-05-21 15:52:41,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:41,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:52:41,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:41,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35986977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:42,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:42,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:42,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369214578] [2021-05-21 15:52:42,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:42,025 INFO L87 Difference]: Start difference. First operand 3828 states and 10618 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:42,591 INFO L93 Difference]: Finished difference Result 5346 states and 13857 transitions. [2021-05-21 15:52:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:52:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:42,597 INFO L225 Difference]: With dead ends: 5346 [2021-05-21 15:52:42,597 INFO L226 Difference]: Without dead ends: 5076 [2021-05-21 15:52:42,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:52:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-05-21 15:52:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3903. [2021-05-21 15:52:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.7788313685289596) internal successors, (10843), 3902 states have internal predecessors, (10843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10843 transitions. [2021-05-21 15:52:42,646 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10843 transitions. Word has length 140 [2021-05-21 15:52:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:42,646 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10843 transitions. [2021-05-21 15:52:42,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10843 transitions. [2021-05-21 15:52:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:42,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:42,649 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:42,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-21 15:52:42,849 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1548867336, now seen corresponding path program 238 times [2021-05-21 15:52:42,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:42,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729168402] [2021-05-21 15:52:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:43,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:43,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729168402] [2021-05-21 15:52:43,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729168402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:43,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583849879] [2021-05-21 15:52:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:43,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:43,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:43,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583849879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:43,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:43,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204128327] [2021-05-21 15:52:43,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:43,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:43,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:43,254 INFO L87 Difference]: Start difference. First operand 3903 states and 10843 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:43,941 INFO L93 Difference]: Finished difference Result 5371 states and 13982 transitions. [2021-05-21 15:52:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:52:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:43,946 INFO L225 Difference]: With dead ends: 5371 [2021-05-21 15:52:43,946 INFO L226 Difference]: Without dead ends: 5101 [2021-05-21 15:52:43,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:52:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-05-21 15:52:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3978. [2021-05-21 15:52:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 2.783002263012321) internal successors, (11068), 3977 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 11068 transitions. [2021-05-21 15:52:43,989 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 11068 transitions. Word has length 140 [2021-05-21 15:52:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:43,989 INFO L482 AbstractCegarLoop]: Abstraction has 3978 states and 11068 transitions. [2021-05-21 15:52:43,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 11068 transitions. [2021-05-21 15:52:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:43,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:43,992 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:44,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-21 15:52:44,192 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1172017014, now seen corresponding path program 239 times [2021-05-21 15:52:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:44,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645794355] [2021-05-21 15:52:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:44,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645794355] [2021-05-21 15:52:44,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645794355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136352296] [2021-05-21 15:52:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:44,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:52:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136352296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:44,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:44,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:44,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107351320] [2021-05-21 15:52:44,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:44,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:44,575 INFO L87 Difference]: Start difference. First operand 3978 states and 11068 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:45,161 INFO L93 Difference]: Finished difference Result 5396 states and 14107 transitions. [2021-05-21 15:52:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:52:45,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:45,166 INFO L225 Difference]: With dead ends: 5396 [2021-05-21 15:52:45,166 INFO L226 Difference]: Without dead ends: 5126 [2021-05-21 15:52:45,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:52:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-05-21 15:52:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4053. [2021-05-21 15:52:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 2.7870187561697928) internal successors, (11293), 4052 states have internal predecessors, (11293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 11293 transitions. [2021-05-21 15:52:45,207 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 11293 transitions. Word has length 140 [2021-05-21 15:52:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:45,207 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 11293 transitions. [2021-05-21 15:52:45,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 11293 transitions. [2021-05-21 15:52:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:45,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:45,211 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:45,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-05-21 15:52:45,411 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1796194746, now seen corresponding path program 240 times [2021-05-21 15:52:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:45,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945657850] [2021-05-21 15:52:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:45,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945657850] [2021-05-21 15:52:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945657850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700393205] [2021-05-21 15:52:45,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:45,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:52:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:45,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700393205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:45,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:45,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744663948] [2021-05-21 15:52:45,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:45,828 INFO L87 Difference]: Start difference. First operand 4053 states and 11293 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:46,593 INFO L93 Difference]: Finished difference Result 5421 states and 14232 transitions. [2021-05-21 15:52:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:52:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:46,599 INFO L225 Difference]: With dead ends: 5421 [2021-05-21 15:52:46,599 INFO L226 Difference]: Without dead ends: 5151 [2021-05-21 15:52:46,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=1140, Invalid=3552, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:52:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-05-21 15:52:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4128. [2021-05-21 15:52:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.790889265810516) internal successors, (11518), 4127 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11518 transitions. [2021-05-21 15:52:46,645 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11518 transitions. Word has length 140 [2021-05-21 15:52:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:46,645 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11518 transitions. [2021-05-21 15:52:46,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11518 transitions. [2021-05-21 15:52:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:46,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:46,648 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:46,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:46,849 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1341978572, now seen corresponding path program 241 times [2021-05-21 15:52:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:46,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610547131] [2021-05-21 15:52:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:47,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:47,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610547131] [2021-05-21 15:52:47,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610547131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:47,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086449541] [2021-05-21 15:52:47,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:47,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086449541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:47,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:47,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:47,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202171006] [2021-05-21 15:52:47,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:47,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:47,216 INFO L87 Difference]: Start difference. First operand 4128 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:47,891 INFO L93 Difference]: Finished difference Result 5446 states and 14357 transitions. [2021-05-21 15:52:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:52:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:47,896 INFO L225 Difference]: With dead ends: 5446 [2021-05-21 15:52:47,896 INFO L226 Difference]: Without dead ends: 5176 [2021-05-21 15:52:47,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:52:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-05-21 15:52:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4203. [2021-05-21 15:52:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 2.7946216087577342) internal successors, (11743), 4202 states have internal predecessors, (11743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 11743 transitions. [2021-05-21 15:52:47,941 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 11743 transitions. Word has length 140 [2021-05-21 15:52:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:47,941 INFO L482 AbstractCegarLoop]: Abstraction has 4203 states and 11743 transitions. [2021-05-21 15:52:47,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 11743 transitions. [2021-05-21 15:52:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:47,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:47,944 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-05-21 15:52:48,149 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -343082236, now seen corresponding path program 242 times [2021-05-21 15:52:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:48,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827611225] [2021-05-21 15:52:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:48,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:48,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827611225] [2021-05-21 15:52:48,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827611225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:48,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078739020] [2021-05-21 15:52:48,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:48,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078739020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:48,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:48,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:48,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656412792] [2021-05-21 15:52:48,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:48,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:48,536 INFO L87 Difference]: Start difference. First operand 4203 states and 11743 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:49,326 INFO L93 Difference]: Finished difference Result 5471 states and 14482 transitions. [2021-05-21 15:52:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:52:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:49,332 INFO L225 Difference]: With dead ends: 5471 [2021-05-21 15:52:49,332 INFO L226 Difference]: Without dead ends: 5201 [2021-05-21 15:52:49,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:52:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-05-21 15:52:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4278. [2021-05-21 15:52:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 2.7982230535422024) internal successors, (11968), 4277 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 11968 transitions. [2021-05-21 15:52:49,378 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 11968 transitions. Word has length 140 [2021-05-21 15:52:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:49,378 INFO L482 AbstractCegarLoop]: Abstraction has 4278 states and 11968 transitions. [2021-05-21 15:52:49,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 11968 transitions. [2021-05-21 15:52:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:49,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:49,382 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:49,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:49,582 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2072557170, now seen corresponding path program 243 times [2021-05-21 15:52:49,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:49,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287203843] [2021-05-21 15:52:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:49,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:49,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287203843] [2021-05-21 15:52:49,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287203843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:49,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405381878] [2021-05-21 15:52:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:49,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:52:49,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405381878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:49,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:49,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:49,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503859944] [2021-05-21 15:52:49,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:49,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:49,972 INFO L87 Difference]: Start difference. First operand 4278 states and 11968 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:50,622 INFO L93 Difference]: Finished difference Result 5496 states and 14607 transitions. [2021-05-21 15:52:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:52:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:50,627 INFO L225 Difference]: With dead ends: 5496 [2021-05-21 15:52:50,627 INFO L226 Difference]: Without dead ends: 5226 [2021-05-21 15:52:50,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:52:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-05-21 15:52:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-05-21 15:52:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.801700367647059) internal successors, (12193), 4352 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12193 transitions. [2021-05-21 15:52:50,671 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12193 transitions. Word has length 140 [2021-05-21 15:52:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:50,671 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12193 transitions. [2021-05-21 15:52:50,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12193 transitions. [2021-05-21 15:52:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:50,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:50,675 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:50,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:50,875 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash -192090814, now seen corresponding path program 244 times [2021-05-21 15:52:50,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:50,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622308350] [2021-05-21 15:52:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:51,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:51,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622308350] [2021-05-21 15:52:51,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622308350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:51,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878816483] [2021-05-21 15:52:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:51,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:51,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:51,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878816483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:51,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:51,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:51,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235005849] [2021-05-21 15:52:51,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:51,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:51,260 INFO L87 Difference]: Start difference. First operand 4353 states and 12193 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:52,111 INFO L93 Difference]: Finished difference Result 5521 states and 14732 transitions. [2021-05-21 15:52:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:52:52,111 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:52,116 INFO L225 Difference]: With dead ends: 5521 [2021-05-21 15:52:52,116 INFO L226 Difference]: Without dead ends: 5251 [2021-05-21 15:52:52,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:52:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-05-21 15:52:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4428. [2021-05-21 15:52:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.805059859950305) internal successors, (12418), 4427 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 12418 transitions. [2021-05-21 15:52:52,160 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 12418 transitions. Word has length 140 [2021-05-21 15:52:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:52,160 INFO L482 AbstractCegarLoop]: Abstraction has 4428 states and 12418 transitions. [2021-05-21 15:52:52,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 12418 transitions. [2021-05-21 15:52:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:52,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:52,163 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:52,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:52,364 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash 422148656, now seen corresponding path program 245 times [2021-05-21 15:52:52,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:52,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871733021] [2021-05-21 15:52:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:52,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:52,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871733021] [2021-05-21 15:52:52,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871733021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:52,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244328994] [2021-05-21 15:52:52,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:52,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:52:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:52,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:52,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:52,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244328994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:52,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:52,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:52,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36405428] [2021-05-21 15:52:52,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:52,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:52,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:52,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:52,730 INFO L87 Difference]: Start difference. First operand 4428 states and 12418 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:53,413 INFO L93 Difference]: Finished difference Result 5591 states and 14977 transitions. [2021-05-21 15:52:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:52:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:53,419 INFO L225 Difference]: With dead ends: 5591 [2021-05-21 15:52:53,419 INFO L226 Difference]: Without dead ends: 5321 [2021-05-21 15:52:53,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 656.4ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:52:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2021-05-21 15:52:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 4503. [2021-05-21 15:52:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.8116392714349177) internal successors, (12658), 4502 states have internal predecessors, (12658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 12658 transitions. [2021-05-21 15:52:53,481 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 12658 transitions. Word has length 140 [2021-05-21 15:52:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:53,481 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 12658 transitions. [2021-05-21 15:52:53,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 12658 transitions. [2021-05-21 15:52:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:53,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:53,484 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:53,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:53,686 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1293093632, now seen corresponding path program 246 times [2021-05-21 15:52:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584239481] [2021-05-21 15:52:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:53,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:53,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584239481] [2021-05-21 15:52:53,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584239481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:53,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804775611] [2021-05-21 15:52:53,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:53,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:52:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:54,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804775611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:54,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:54,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:54,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238118800] [2021-05-21 15:52:54,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:54,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:54,068 INFO L87 Difference]: Start difference. First operand 4503 states and 12658 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:54,993 INFO L93 Difference]: Finished difference Result 6169 states and 16603 transitions. [2021-05-21 15:52:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:52:54,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:54,999 INFO L225 Difference]: With dead ends: 6169 [2021-05-21 15:52:54,999 INFO L226 Difference]: Without dead ends: 5546 [2021-05-21 15:52:55,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=1529, Invalid=4323, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:52:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-05-21 15:52:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4578. [2021-05-21 15:52:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.815818221542495) internal successors, (12888), 4577 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-05-21 15:52:55,050 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-05-21 15:52:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:55,050 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-05-21 15:52:55,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-05-21 15:52:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:55,054 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:55,054 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:55,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-05-21 15:52:55,256 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:55,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1969226062, now seen corresponding path program 247 times [2021-05-21 15:52:55,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:55,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260261987] [2021-05-21 15:52:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:55,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260261987] [2021-05-21 15:52:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260261987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221809699] [2021-05-21 15:52:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:55,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221809699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:55,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:55,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-05-21 15:52:55,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906410983] [2021-05-21 15:52:55,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 15:52:55,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 15:52:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:52:55,640 INFO L87 Difference]: Start difference. First operand 4578 states and 12888 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:56,363 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-05-21 15:52:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:52:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:56,371 INFO L225 Difference]: With dead ends: 6398 [2021-05-21 15:52:56,371 INFO L226 Difference]: Without dead ends: 6128 [2021-05-21 15:52:56,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 686.2ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:52:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-05-21 15:52:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-05-21 15:52:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4757 states have (on average 2.8267815850325837) internal successors, (13447), 4757 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-05-21 15:52:56,428 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-05-21 15:52:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:56,428 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-05-21 15:52:56,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-05-21 15:52:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-21 15:52:56,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:56,432 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:56,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-05-21 15:52:56,638 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1991569312, now seen corresponding path program 248 times [2021-05-21 15:52:56,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:56,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946329505] [2021-05-21 15:52:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:56,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946329505] [2021-05-21 15:52:56,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946329505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:56,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726130266] [2021-05-21 15:52:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:56,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:52:56,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 15:52:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:57,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726130266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:57,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:57,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-05-21 15:52:57,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146758476] [2021-05-21 15:52:57,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:57,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:57,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:57,018 INFO L87 Difference]: Start difference. First operand 4758 states and 13447 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:57,979 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-05-21 15:52:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:52:57,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-05-21 15:52:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:57,984 INFO L225 Difference]: With dead ends: 6221 [2021-05-21 15:52:57,985 INFO L226 Difference]: Without dead ends: 5646 [2021-05-21 15:52:57,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 928.0ms TimeCoverageRelationStatistics Valid=1708, Invalid=4612, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:52:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-05-21 15:52:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-05-21 15:52:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7382885696439727) internal successors, (8768), 3202 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-05-21 15:52:58,023 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-05-21 15:52:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:58,023 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-05-21 15:52:58,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-05-21 15:52:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:52:58,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:58,025 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:58,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-21 15:52:58,233 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1192364991, now seen corresponding path program 249 times [2021-05-21 15:52:58,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:58,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284029863] [2021-05-21 15:52:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:58,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:58,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284029863] [2021-05-21 15:52:58,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284029863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:58,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654206542] [2021-05-21 15:52:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:58,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:52:58,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:52:58,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654206542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:58,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:58,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:52:58,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103112312] [2021-05-21 15:52:58,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:52:58,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:52:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:52:58,687 INFO L87 Difference]: Start difference. First operand 3203 states and 8768 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:52:59,113 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-05-21 15:52:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:52:59,113 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:52:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:52:59,117 INFO L225 Difference]: With dead ends: 4721 [2021-05-21 15:52:59,117 INFO L226 Difference]: Without dead ends: 4451 [2021-05-21 15:52:59,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:52:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-05-21 15:52:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-05-21 15:52:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.744278303326213) internal successors, (8993), 3277 states have internal predecessors, (8993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-05-21 15:52:59,147 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-05-21 15:52:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:52:59,147 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-05-21 15:52:59,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:52:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-05-21 15:52:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:52:59,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:52:59,149 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:52:59,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-21 15:52:59,350 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:52:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:52:59,350 INFO L82 PathProgramCache]: Analyzing trace with hash 315630223, now seen corresponding path program 250 times [2021-05-21 15:52:59,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:52:59,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417182228] [2021-05-21 15:52:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:52:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:52:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:59,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:52:59,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417182228] [2021-05-21 15:52:59,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417182228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:59,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893890569] [2021-05-21 15:52:59,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:52:59,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:52:59,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:52:59,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:52:59,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:52:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:52:59,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893890569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:52:59,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:52:59,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:52:59,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290144625] [2021-05-21 15:52:59,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:52:59,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:52:59,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:52:59,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:52:59,830 INFO L87 Difference]: Start difference. First operand 3278 states and 8993 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:00,294 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-05-21 15:53:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:53:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:00,299 INFO L225 Difference]: With dead ends: 5291 [2021-05-21 15:53:00,299 INFO L226 Difference]: Without dead ends: 5021 [2021-05-21 15:53:00,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:53:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-05-21 15:53:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-05-21 15:53:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.75) internal successors, (9218), 3352 states have internal predecessors, (9218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-05-21 15:53:00,336 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-05-21 15:53:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:00,336 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-05-21 15:53:00,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-05-21 15:53:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:00,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:00,338 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:00,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:00,539 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1421696131, now seen corresponding path program 251 times [2021-05-21 15:53:00,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:00,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716123613] [2021-05-21 15:53:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:00,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716123613] [2021-05-21 15:53:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716123613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365818729] [2021-05-21 15:53:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:00,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:53:00,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:00,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:00,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365818729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:00,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:00,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:00,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823885010] [2021-05-21 15:53:00,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:00,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:00,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:00,961 INFO L87 Difference]: Start difference. First operand 3353 states and 9218 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:01,421 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-05-21 15:53:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:53:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:01,425 INFO L225 Difference]: With dead ends: 5321 [2021-05-21 15:53:01,425 INFO L226 Difference]: Without dead ends: 5051 [2021-05-21 15:53:01,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 528.7ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:53:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-05-21 15:53:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-05-21 15:53:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7554712576597606) internal successors, (9443), 3427 states have internal predecessors, (9443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-05-21 15:53:01,456 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-05-21 15:53:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:01,457 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-05-21 15:53:01,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-05-21 15:53:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:01,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:01,459 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:01,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-05-21 15:53:01,660 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:01,660 INFO L82 PathProgramCache]: Analyzing trace with hash -57147827, now seen corresponding path program 252 times [2021-05-21 15:53:01,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:01,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514157535] [2021-05-21 15:53:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:01,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:01,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514157535] [2021-05-21 15:53:01,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514157535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:01,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112504372] [2021-05-21 15:53:01,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:01,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:53:01,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112504372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:02,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:02,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998608580] [2021-05-21 15:53:02,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:02,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:02,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:02,115 INFO L87 Difference]: Start difference. First operand 3428 states and 9443 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:02,629 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-05-21 15:53:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:53:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:02,634 INFO L225 Difference]: With dead ends: 5346 [2021-05-21 15:53:02,634 INFO L226 Difference]: Without dead ends: 5076 [2021-05-21 15:53:02,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:53:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-05-21 15:53:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-05-21 15:53:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7607081667618503) internal successors, (9668), 3502 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-05-21 15:53:02,668 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-05-21 15:53:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:02,668 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-05-21 15:53:02,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-05-21 15:53:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:02,670 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:02,670 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:02,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:02,872 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1960587451, now seen corresponding path program 253 times [2021-05-21 15:53:02,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:02,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498064218] [2021-05-21 15:53:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:03,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:03,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498064218] [2021-05-21 15:53:03,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498064218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:03,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687178174] [2021-05-21 15:53:03,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:03,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687178174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:03,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:03,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589849508] [2021-05-21 15:53:03,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:03,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:03,287 INFO L87 Difference]: Start difference. First operand 3503 states and 9668 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:03,777 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-05-21 15:53:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:53:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:03,782 INFO L225 Difference]: With dead ends: 5371 [2021-05-21 15:53:03,782 INFO L226 Difference]: Without dead ends: 5101 [2021-05-21 15:53:03,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 545.7ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:53:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-05-21 15:53:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-05-21 15:53:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7657254682694994) internal successors, (9893), 3577 states have internal predecessors, (9893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-05-21 15:53:03,818 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-05-21 15:53:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:03,818 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-05-21 15:53:03,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-05-21 15:53:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:03,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:03,821 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:04,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:04,025 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1062064011, now seen corresponding path program 254 times [2021-05-21 15:53:04,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:04,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872934703] [2021-05-21 15:53:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:04,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:04,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872934703] [2021-05-21 15:53:04,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872934703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:04,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989215648] [2021-05-21 15:53:04,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:04,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989215648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:04,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:04,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:04,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597963995] [2021-05-21 15:53:04,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:04,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:04,461 INFO L87 Difference]: Start difference. First operand 3578 states and 9893 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:05,021 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-05-21 15:53:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:53:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:05,027 INFO L225 Difference]: With dead ends: 5396 [2021-05-21 15:53:05,027 INFO L226 Difference]: Without dead ends: 5126 [2021-05-21 15:53:05,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 618.0ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:53:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-05-21 15:53:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-05-21 15:53:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7705366922234393) internal successors, (10118), 3652 states have internal predecessors, (10118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-05-21 15:53:05,064 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-05-21 15:53:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:05,064 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-05-21 15:53:05,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-05-21 15:53:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:05,067 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:05,067 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:05,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:05,269 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:05,269 INFO L82 PathProgramCache]: Analyzing trace with hash -552889479, now seen corresponding path program 255 times [2021-05-21 15:53:05,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:05,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722674018] [2021-05-21 15:53:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:05,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:05,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722674018] [2021-05-21 15:53:05,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722674018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:05,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741111904] [2021-05-21 15:53:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:05,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:53:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:05,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741111904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:05,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:05,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:05,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085735100] [2021-05-21 15:53:05,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:05,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:05,740 INFO L87 Difference]: Start difference. First operand 3653 states and 10118 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:06,265 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-05-21 15:53:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:53:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:06,271 INFO L225 Difference]: With dead ends: 5421 [2021-05-21 15:53:06,271 INFO L226 Difference]: Without dead ends: 5151 [2021-05-21 15:53:06,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:53:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-05-21 15:53:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-05-21 15:53:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.775154279581433) internal successors, (10343), 3727 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-05-21 15:53:06,314 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-05-21 15:53:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:06,314 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-05-21 15:53:06,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-05-21 15:53:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:06,317 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:06,317 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:06,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:06,518 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -933333431, now seen corresponding path program 256 times [2021-05-21 15:53:06,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:06,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400850818] [2021-05-21 15:53:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:06,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:06,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400850818] [2021-05-21 15:53:06,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400850818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:06,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874469788] [2021-05-21 15:53:06,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:06,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:06,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:06,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:06,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874469788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:06,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:06,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:06,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827069771] [2021-05-21 15:53:06,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:06,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:06,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:06,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:06,959 INFO L87 Difference]: Start difference. First operand 3728 states and 10343 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:07,614 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-05-21 15:53:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:53:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:07,619 INFO L225 Difference]: With dead ends: 5446 [2021-05-21 15:53:07,619 INFO L226 Difference]: Without dead ends: 5176 [2021-05-21 15:53:07,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:53:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-05-21 15:53:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-05-21 15:53:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.7795896896370333) internal successors, (10568), 3802 states have internal predecessors, (10568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-05-21 15:53:07,658 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-05-21 15:53:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:07,658 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-05-21 15:53:07,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-05-21 15:53:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:07,661 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:07,661 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:07,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:07,861 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash -308958281, now seen corresponding path program 257 times [2021-05-21 15:53:07,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:07,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95704806] [2021-05-21 15:53:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:08,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:08,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95704806] [2021-05-21 15:53:08,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95704806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222784154] [2021-05-21 15:53:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:08,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:53:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:08,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:08,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222784154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:08,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:08,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:08,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128138266] [2021-05-21 15:53:08,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:08,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:08,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:08,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:08,264 INFO L87 Difference]: Start difference. First operand 3803 states and 10568 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:08,812 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-05-21 15:53:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:53:08,812 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:08,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:08,817 INFO L225 Difference]: With dead ends: 5471 [2021-05-21 15:53:08,817 INFO L226 Difference]: Without dead ends: 5201 [2021-05-21 15:53:08,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:53:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-05-21 15:53:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-05-21 15:53:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7838534949703377) internal successors, (10793), 3877 states have internal predecessors, (10793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-05-21 15:53:08,854 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-05-21 15:53:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:08,854 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-05-21 15:53:08,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-05-21 15:53:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:08,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:08,857 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:09,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-21 15:53:09,058 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 500093575, now seen corresponding path program 258 times [2021-05-21 15:53:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:09,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648514317] [2021-05-21 15:53:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:09,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648514317] [2021-05-21 15:53:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648514317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:09,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284587540] [2021-05-21 15:53:09,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:09,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:53:09,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284587540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:09,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:09,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214882363] [2021-05-21 15:53:09,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:09,498 INFO L87 Difference]: Start difference. First operand 3878 states and 10793 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:10,159 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-05-21 15:53:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:53:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:10,164 INFO L225 Difference]: With dead ends: 5496 [2021-05-21 15:53:10,164 INFO L226 Difference]: Without dead ends: 5226 [2021-05-21 15:53:10,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:53:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-05-21 15:53:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-05-21 15:53:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7879554655870447) internal successors, (11018), 3952 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-05-21 15:53:10,202 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-05-21 15:53:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:10,202 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-05-21 15:53:10,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-05-21 15:53:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:10,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:10,205 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:10,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:10,406 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:10,406 INFO L82 PathProgramCache]: Analyzing trace with hash -891856523, now seen corresponding path program 259 times [2021-05-21 15:53:10,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:10,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091005325] [2021-05-21 15:53:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:10,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:10,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091005325] [2021-05-21 15:53:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091005325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:10,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272791041] [2021-05-21 15:53:10,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:10,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:10,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272791041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:10,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:10,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:10,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063742264] [2021-05-21 15:53:10,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:10,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:10,816 INFO L87 Difference]: Start difference. First operand 3953 states and 11018 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:11,440 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-05-21 15:53:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:53:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:11,452 INFO L225 Difference]: With dead ends: 5521 [2021-05-21 15:53:11,452 INFO L226 Difference]: Without dead ends: 5251 [2021-05-21 15:53:11,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:53:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-05-21 15:53:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-05-21 15:53:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7919046436553265) internal successors, (11243), 4027 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-05-21 15:53:11,491 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-05-21 15:53:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:11,492 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-05-21 15:53:11,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-05-21 15:53:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:11,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:11,495 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:11,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-05-21 15:53:11,695 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1136933819, now seen corresponding path program 260 times [2021-05-21 15:53:11,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:11,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98368765] [2021-05-21 15:53:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:11,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:11,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98368765] [2021-05-21 15:53:11,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98368765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:11,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311304611] [2021-05-21 15:53:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:11,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:11,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:11,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311304611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:12,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:12,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:12,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668863649] [2021-05-21 15:53:12,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:12,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:12,097 INFO L87 Difference]: Start difference. First operand 4028 states and 11243 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:12,809 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-05-21 15:53:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:53:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:12,815 INFO L225 Difference]: With dead ends: 5546 [2021-05-21 15:53:12,815 INFO L226 Difference]: Without dead ends: 5276 [2021-05-21 15:53:12,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:53:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-05-21 15:53:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-05-21 15:53:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.795709410043881) internal successors, (11468), 4102 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-05-21 15:53:12,859 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-05-21 15:53:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:12,859 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-05-21 15:53:12,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-05-21 15:53:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:12,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:12,862 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:13,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-05-21 15:53:13,062 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1513784141, now seen corresponding path program 261 times [2021-05-21 15:53:13,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:13,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235143381] [2021-05-21 15:53:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:13,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235143381] [2021-05-21 15:53:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235143381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353049519] [2021-05-21 15:53:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:13,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:53:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:13,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353049519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:13,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:13,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705584388] [2021-05-21 15:53:13,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:13,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:13,476 INFO L87 Difference]: Start difference. First operand 4103 states and 11468 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:14,098 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-05-21 15:53:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:53:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:14,104 INFO L225 Difference]: With dead ends: 5571 [2021-05-21 15:53:14,104 INFO L226 Difference]: Without dead ends: 5301 [2021-05-21 15:53:14,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:53:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-05-21 15:53:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-05-21 15:53:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.799377543691645) internal successors, (11693), 4177 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-05-21 15:53:14,147 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-05-21 15:53:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:14,147 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-05-21 15:53:14,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-05-21 15:53:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:14,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:14,150 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:14,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:14,351 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash -187028605, now seen corresponding path program 262 times [2021-05-21 15:53:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:14,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958971481] [2021-05-21 15:53:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:14,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:14,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958971481] [2021-05-21 15:53:14,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958971481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:14,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807303893] [2021-05-21 15:53:14,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:14,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:14,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807303893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:14,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:14,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:14,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90018933] [2021-05-21 15:53:14,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:14,757 INFO L87 Difference]: Start difference. First operand 4178 states and 11693 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:15,530 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-05-21 15:53:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:53:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:15,535 INFO L225 Difference]: With dead ends: 5596 [2021-05-21 15:53:15,535 INFO L226 Difference]: Without dead ends: 5326 [2021-05-21 15:53:15,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:53:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-05-21 15:53:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-05-21 15:53:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.8029162746942617) internal successors, (11918), 4252 states have internal predecessors, (11918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-05-21 15:53:15,583 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-05-21 15:53:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:15,583 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-05-21 15:53:15,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-05-21 15:53:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:15,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:15,587 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:15,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-05-21 15:53:15,787 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:15,787 INFO L82 PathProgramCache]: Analyzing trace with hash 267187569, now seen corresponding path program 263 times [2021-05-21 15:53:15,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:15,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629565913] [2021-05-21 15:53:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:15,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:15,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629565913] [2021-05-21 15:53:15,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629565913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:15,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304649340] [2021-05-21 15:53:15,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:16,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:53:16,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:16,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304649340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:16,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:16,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:16,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008647760] [2021-05-21 15:53:16,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:16,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:16,170 INFO L87 Difference]: Start difference. First operand 4253 states and 11918 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:16,839 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-05-21 15:53:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:53:16,839 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:16,845 INFO L225 Difference]: With dead ends: 5621 [2021-05-21 15:53:16,845 INFO L226 Difference]: Without dead ends: 5351 [2021-05-21 15:53:16,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 648.2ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:53:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-05-21 15:53:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-05-21 15:53:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.8063323318696556) internal successors, (12143), 4327 states have internal predecessors, (12143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-05-21 15:53:16,893 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-05-21 15:53:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:16,914 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-05-21 15:53:16,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-05-21 15:53:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:16,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:16,917 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:17,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:17,118 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1266083905, now seen corresponding path program 264 times [2021-05-21 15:53:17,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:17,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164768289] [2021-05-21 15:53:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:17,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164768289] [2021-05-21 15:53:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164768289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799839443] [2021-05-21 15:53:17,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:17,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:53:17,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:17,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799839443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:17,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877318020] [2021-05-21 15:53:17,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:17,526 INFO L87 Difference]: Start difference. First operand 4328 states and 12143 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:18,348 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-05-21 15:53:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:53:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:18,354 INFO L225 Difference]: With dead ends: 5646 [2021-05-21 15:53:18,354 INFO L226 Difference]: Without dead ends: 5376 [2021-05-21 15:53:18,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 796.7ms TimeCoverageRelationStatistics Valid=1360, Invalid=4042, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:53:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-05-21 15:53:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-05-21 15:53:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.809631985461154) internal successors, (12368), 4402 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-05-21 15:53:18,405 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-05-21 15:53:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:18,405 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-05-21 15:53:18,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-05-21 15:53:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:18,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:18,409 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:18,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:18,609 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash -613243985, now seen corresponding path program 265 times [2021-05-21 15:53:18,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:18,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415478069] [2021-05-21 15:53:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:18,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415478069] [2021-05-21 15:53:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415478069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627557355] [2021-05-21 15:53:18,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627557355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:19,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:19,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:19,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175773442] [2021-05-21 15:53:19,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:19,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:19,001 INFO L87 Difference]: Start difference. First operand 4403 states and 12368 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:19,685 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-05-21 15:53:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:53:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:19,690 INFO L225 Difference]: With dead ends: 5671 [2021-05-21 15:53:19,690 INFO L226 Difference]: Without dead ends: 5401 [2021-05-21 15:53:19,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 662.8ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:53:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-05-21 15:53:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-05-21 15:53:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.812821085548358) internal successors, (12593), 4477 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-05-21 15:53:19,733 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-05-21 15:53:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:19,734 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-05-21 15:53:19,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-05-21 15:53:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:19,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:19,737 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:19,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:19,937 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:19,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1417075327, now seen corresponding path program 266 times [2021-05-21 15:53:19,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:19,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950753361] [2021-05-21 15:53:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:20,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950753361] [2021-05-21 15:53:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950753361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415118406] [2021-05-21 15:53:20,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:20,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:20,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:20,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415118406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:20,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:20,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:20,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238061059] [2021-05-21 15:53:20,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:20,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:20,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:20,328 INFO L87 Difference]: Start difference. First operand 4478 states and 12593 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:21,193 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-05-21 15:53:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:53:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:21,198 INFO L225 Difference]: With dead ends: 5696 [2021-05-21 15:53:21,198 INFO L226 Difference]: Without dead ends: 5426 [2021-05-21 15:53:21,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:53:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-05-21 15:53:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-05-21 15:53:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.8159050966608086) internal successors, (12818), 4552 states have internal predecessors, (12818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-05-21 15:53:21,242 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-05-21 15:53:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:21,242 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-05-21 15:53:21,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-05-21 15:53:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:21,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:21,245 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:21,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:21,446 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2031314797, now seen corresponding path program 267 times [2021-05-21 15:53:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:21,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326715887] [2021-05-21 15:53:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:21,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:21,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326715887] [2021-05-21 15:53:21,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326715887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:21,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059744649] [2021-05-21 15:53:21,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:21,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-21 15:53:21,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059744649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:21,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:21,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:21,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337616964] [2021-05-21 15:53:21,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:21,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:21,829 INFO L87 Difference]: Start difference. First operand 4553 states and 12818 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:22,552 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-05-21 15:53:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:53:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:22,558 INFO L225 Difference]: With dead ends: 5766 [2021-05-21 15:53:22,558 INFO L226 Difference]: Without dead ends: 5496 [2021-05-21 15:53:22,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:53:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-05-21 15:53:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-05-21 15:53:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.822130970391182) internal successors, (13058), 4627 states have internal predecessors, (13058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-05-21 15:53:22,605 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-05-21 15:53:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:22,605 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-05-21 15:53:22,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-05-21 15:53:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:22,609 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:22,609 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:22,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:22,809 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash 316072509, now seen corresponding path program 268 times [2021-05-21 15:53:22,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:22,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690768192] [2021-05-21 15:53:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:23,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690768192] [2021-05-21 15:53:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690768192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17519865] [2021-05-21 15:53:23,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:23,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:23,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:23,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:23,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:23,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17519865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:23,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:23,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995533256] [2021-05-21 15:53:23,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:23,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:23,220 INFO L87 Difference]: Start difference. First operand 4628 states and 13058 transitions. Second operand has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:24,150 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-05-21 15:53:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:53:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:24,156 INFO L225 Difference]: With dead ends: 6344 [2021-05-21 15:53:24,156 INFO L226 Difference]: Without dead ends: 5721 [2021-05-21 15:53:24,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 880.4ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:53:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-05-21 15:53:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-05-21 15:53:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8260314759676732) internal successors, (13288), 4702 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-05-21 15:53:24,199 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-05-21 15:53:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:24,199 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-05-21 15:53:24,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.966666666666667) internal successors, (149), 30 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-05-21 15:53:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:24,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:24,202 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:24,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:24,403 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash -716575093, now seen corresponding path program 269 times [2021-05-21 15:53:24,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:24,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775718357] [2021-05-21 15:53:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:24,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775718357] [2021-05-21 15:53:24,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775718357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556222841] [2021-05-21 15:53:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:24,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-21 15:53:24,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:24,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556222841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:24,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:24,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-05-21 15:53:24,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813237168] [2021-05-21 15:53:24,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:24,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:24,817 INFO L87 Difference]: Start difference. First operand 4703 states and 13288 transitions. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:25,566 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-05-21 15:53:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:53:25,567 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:25,573 INFO L225 Difference]: With dead ends: 6548 [2021-05-21 15:53:25,573 INFO L226 Difference]: Without dead ends: 6278 [2021-05-21 15:53:25,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:53:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-05-21 15:53:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-05-21 15:53:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4883 states, 4882 states have (on average 2.8363375665710775) internal successors, (13847), 4882 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-05-21 15:53:25,620 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-05-21 15:53:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:25,620 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-05-21 15:53:25,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-05-21 15:53:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-21 15:53:25,623 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:25,623 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:25,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-21 15:53:25,824 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash -694231843, now seen corresponding path program 270 times [2021-05-21 15:53:25,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:25,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992687807] [2021-05-21 15:53:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:26,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992687807] [2021-05-21 15:53:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992687807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862014110] [2021-05-21 15:53:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:26,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-05-21 15:53:26,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:26,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:53:26,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:26,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862014110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:26,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:26,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-05-21 15:53:26,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753581070] [2021-05-21 15:53:26,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:26,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:26,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:26,224 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:27,179 INFO L93 Difference]: Finished difference Result 6416 states and 17436 transitions. [2021-05-21 15:53:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:53:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-05-21 15:53:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:27,185 INFO L225 Difference]: With dead ends: 6416 [2021-05-21 15:53:27,185 INFO L226 Difference]: Without dead ends: 5841 [2021-05-21 15:53:27,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 938.3ms TimeCoverageRelationStatistics Valid=1844, Invalid=4962, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:53:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2021-05-21 15:53:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 3124. [2021-05-21 15:53:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.739673390970221) internal successors, (8556), 3123 states have internal predecessors, (8556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 8556 transitions. [2021-05-21 15:53:27,217 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 8556 transitions. Word has length 145 [2021-05-21 15:53:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:27,218 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 8556 transitions. [2021-05-21 15:53:27,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 8556 transitions. [2021-05-21 15:53:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:27,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:27,220 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-21 15:53:27,420 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash 652101711, now seen corresponding path program 271 times [2021-05-21 15:53:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:27,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315070782] [2021-05-21 15:53:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:27,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315070782] [2021-05-21 15:53:27,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315070782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:27,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11476794] [2021-05-21 15:53:27,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:53:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:27,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11476794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:27,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:27,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-05-21 15:53:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132853608] [2021-05-21 15:53:27,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:53:27,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:53:27,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:53:27,892 INFO L87 Difference]: Start difference. First operand 3124 states and 8556 transitions. Second operand has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:28,393 INFO L93 Difference]: Finished difference Result 4364 states and 11356 transitions. [2021-05-21 15:53:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:53:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:28,398 INFO L225 Difference]: With dead ends: 4364 [2021-05-21 15:53:28,398 INFO L226 Difference]: Without dead ends: 4030 [2021-05-21 15:53:28,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 584.6ms TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:53:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-05-21 15:53:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3209. [2021-05-21 15:53:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.720074812967581) internal successors, (8726), 3208 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8726 transitions. [2021-05-21 15:53:28,428 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8726 transitions. Word has length 150 [2021-05-21 15:53:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:28,428 INFO L482 AbstractCegarLoop]: Abstraction has 3209 states and 8726 transitions. [2021-05-21 15:53:28,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8726 transitions. [2021-05-21 15:53:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:28,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:28,430 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:28,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-21 15:53:28,634 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1417310995, now seen corresponding path program 272 times [2021-05-21 15:53:28,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:28,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153726550] [2021-05-21 15:53:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:28,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:28,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153726550] [2021-05-21 15:53:28,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153726550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:28,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574222807] [2021-05-21 15:53:28,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574222807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:29,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:29,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060426421] [2021-05-21 15:53:29,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:29,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:29,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:29,098 INFO L87 Difference]: Start difference. First operand 3209 states and 8726 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:29,497 INFO L93 Difference]: Finished difference Result 5486 states and 13537 transitions. [2021-05-21 15:53:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:53:29,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:29,502 INFO L225 Difference]: With dead ends: 5486 [2021-05-21 15:53:29,502 INFO L226 Difference]: Without dead ends: 5216 [2021-05-21 15:53:29,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=854, Invalid=2226, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:53:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-05-21 15:53:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 3353. [2021-05-21 15:53:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7276252983293556) internal successors, (9143), 3352 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9143 transitions. [2021-05-21 15:53:29,535 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9143 transitions. Word has length 150 [2021-05-21 15:53:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:29,535 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9143 transitions. [2021-05-21 15:53:29,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9143 transitions. [2021-05-21 15:53:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:29,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:29,537 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:29,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-05-21 15:53:29,738 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1410972189, now seen corresponding path program 273 times [2021-05-21 15:53:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:29,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860051295] [2021-05-21 15:53:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:29,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:29,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860051295] [2021-05-21 15:53:29,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860051295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:29,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382797771] [2021-05-21 15:53:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:30,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:53:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:30,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382797771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:30,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:30,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:30,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052957164] [2021-05-21 15:53:30,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:30,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:30,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:30,216 INFO L87 Difference]: Start difference. First operand 3353 states and 9143 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:30,690 INFO L93 Difference]: Finished difference Result 5446 states and 13532 transitions. [2021-05-21 15:53:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:53:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:30,695 INFO L225 Difference]: With dead ends: 5446 [2021-05-21 15:53:30,695 INFO L226 Difference]: Without dead ends: 5176 [2021-05-21 15:53:30,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:53:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-05-21 15:53:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3428. [2021-05-21 15:53:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7335862270207176) internal successors, (9368), 3427 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9368 transitions. [2021-05-21 15:53:30,726 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9368 transitions. Word has length 150 [2021-05-21 15:53:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:30,726 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9368 transitions. [2021-05-21 15:53:30,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9368 transitions. [2021-05-21 15:53:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:30,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:30,729 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:30,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:30,930 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1546193583, now seen corresponding path program 274 times [2021-05-21 15:53:30,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:30,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678130460] [2021-05-21 15:53:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:31,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678130460] [2021-05-21 15:53:31,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678130460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:31,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043687302] [2021-05-21 15:53:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:31,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:31,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043687302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:31,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:31,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153564420] [2021-05-21 15:53:31,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:31,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:31,360 INFO L87 Difference]: Start difference. First operand 3428 states and 9368 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:31,800 INFO L93 Difference]: Finished difference Result 5496 states and 13707 transitions. [2021-05-21 15:53:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:53:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:31,805 INFO L225 Difference]: With dead ends: 5496 [2021-05-21 15:53:31,805 INFO L226 Difference]: Without dead ends: 5226 [2021-05-21 15:53:31,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=855, Invalid=2451, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:53:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-05-21 15:53:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3503. [2021-05-21 15:53:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7392918332381497) internal successors, (9593), 3502 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9593 transitions. [2021-05-21 15:53:31,838 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9593 transitions. Word has length 150 [2021-05-21 15:53:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:31,838 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9593 transitions. [2021-05-21 15:53:31,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9593 transitions. [2021-05-21 15:53:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:31,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:31,841 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:32,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-05-21 15:53:32,041 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:32,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1872038945, now seen corresponding path program 275 times [2021-05-21 15:53:32,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:32,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809254730] [2021-05-21 15:53:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:32,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:32,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809254730] [2021-05-21 15:53:32,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809254730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:32,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803833042] [2021-05-21 15:53:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:32,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:53:32,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803833042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:32,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:32,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623359147] [2021-05-21 15:53:32,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:32,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:32,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:32,515 INFO L87 Difference]: Start difference. First operand 3503 states and 9593 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:33,085 INFO L93 Difference]: Finished difference Result 5521 states and 13832 transitions. [2021-05-21 15:53:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:53:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:33,090 INFO L225 Difference]: With dead ends: 5521 [2021-05-21 15:53:33,090 INFO L226 Difference]: Without dead ends: 5251 [2021-05-21 15:53:33,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:53:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-05-21 15:53:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3578. [2021-05-21 15:53:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7447581772435004) internal successors, (9818), 3577 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9818 transitions. [2021-05-21 15:53:33,125 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9818 transitions. Word has length 150 [2021-05-21 15:53:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:33,125 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9818 transitions. [2021-05-21 15:53:33,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9818 transitions. [2021-05-21 15:53:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:33,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:33,128 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:33,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:33,328 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash 134712591, now seen corresponding path program 276 times [2021-05-21 15:53:33,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:33,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349823361] [2021-05-21 15:53:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:33,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349823361] [2021-05-21 15:53:33,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349823361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630110276] [2021-05-21 15:53:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:33,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:53:33,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:33,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630110276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:33,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:33,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:33,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439709009] [2021-05-21 15:53:33,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:33,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:33,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:33,780 INFO L87 Difference]: Start difference. First operand 3578 states and 9818 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:34,261 INFO L93 Difference]: Finished difference Result 5546 states and 13957 transitions. [2021-05-21 15:53:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:53:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:34,267 INFO L225 Difference]: With dead ends: 5546 [2021-05-21 15:53:34,267 INFO L226 Difference]: Without dead ends: 5276 [2021-05-21 15:53:34,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:53:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-05-21 15:53:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 3653. [2021-05-21 15:53:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.75) internal successors, (10043), 3652 states have internal predecessors, (10043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10043 transitions. [2021-05-21 15:53:34,315 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10043 transitions. Word has length 150 [2021-05-21 15:53:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:34,315 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10043 transitions. [2021-05-21 15:53:34,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10043 transitions. [2021-05-21 15:53:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:34,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:34,318 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:34,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:34,526 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1499260895, now seen corresponding path program 277 times [2021-05-21 15:53:34,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:34,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129898364] [2021-05-21 15:53:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:34,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:34,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129898364] [2021-05-21 15:53:34,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129898364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:34,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117456815] [2021-05-21 15:53:34,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:34,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117456815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:34,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:34,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:34,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29358772] [2021-05-21 15:53:34,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:34,977 INFO L87 Difference]: Start difference. First operand 3653 states and 10043 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:35,573 INFO L93 Difference]: Finished difference Result 5571 states and 14082 transitions. [2021-05-21 15:53:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:53:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:35,579 INFO L225 Difference]: With dead ends: 5571 [2021-05-21 15:53:35,579 INFO L226 Difference]: Without dead ends: 5301 [2021-05-21 15:53:35,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=963, Invalid=3069, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:53:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-05-21 15:53:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3728. [2021-05-21 15:53:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.7550308559162864) internal successors, (10268), 3727 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10268 transitions. [2021-05-21 15:53:35,618 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10268 transitions. Word has length 150 [2021-05-21 15:53:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:35,618 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10268 transitions. [2021-05-21 15:53:35,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10268 transitions. [2021-05-21 15:53:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:35,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:35,621 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:35,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:35,837 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash -777971123, now seen corresponding path program 278 times [2021-05-21 15:53:35,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:35,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324660922] [2021-05-21 15:53:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:36,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:36,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324660922] [2021-05-21 15:53:36,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324660922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:36,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163177199] [2021-05-21 15:53:36,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:36,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:36,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163177199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:36,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:36,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548322143] [2021-05-21 15:53:36,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:36,310 INFO L87 Difference]: Start difference. First operand 3728 states and 10268 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:36,826 INFO L93 Difference]: Finished difference Result 5596 states and 14207 transitions. [2021-05-21 15:53:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:53:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:36,832 INFO L225 Difference]: With dead ends: 5596 [2021-05-21 15:53:36,832 INFO L226 Difference]: Without dead ends: 5326 [2021-05-21 15:53:36,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:53:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-05-21 15:53:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 3803. [2021-05-21 15:53:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.759863229879011) internal successors, (10493), 3802 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10493 transitions. [2021-05-21 15:53:36,872 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10493 transitions. Word has length 150 [2021-05-21 15:53:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:36,872 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10493 transitions. [2021-05-21 15:53:36,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10493 transitions. [2021-05-21 15:53:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:36,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:36,875 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:37,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:37,076 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1676494563, now seen corresponding path program 279 times [2021-05-21 15:53:37,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:37,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927143610] [2021-05-21 15:53:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:37,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:37,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927143610] [2021-05-21 15:53:37,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927143610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:37,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035153014] [2021-05-21 15:53:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:37,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:53:37,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:37,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035153014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:37,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:37,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:37,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413654264] [2021-05-21 15:53:37,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:37,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:37,527 INFO L87 Difference]: Start difference. First operand 3803 states and 10493 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:38,152 INFO L93 Difference]: Finished difference Result 5621 states and 14332 transitions. [2021-05-21 15:53:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:53:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:38,158 INFO L225 Difference]: With dead ends: 5621 [2021-05-21 15:53:38,158 INFO L226 Difference]: Without dead ends: 5351 [2021-05-21 15:53:38,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 675.9ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:53:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-05-21 15:53:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3878. [2021-05-21 15:53:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7645086407015733) internal successors, (10718), 3877 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10718 transitions. [2021-05-21 15:53:38,210 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10718 transitions. Word has length 150 [2021-05-21 15:53:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:38,210 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10718 transitions. [2021-05-21 15:53:38,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10718 transitions. [2021-05-21 15:53:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:38,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:38,213 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:38,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-05-21 15:53:38,413 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1003519243, now seen corresponding path program 280 times [2021-05-21 15:53:38,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:38,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782936225] [2021-05-21 15:53:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:38,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782936225] [2021-05-21 15:53:38,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782936225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364903698] [2021-05-21 15:53:38,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:38,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:38,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364903698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:38,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:38,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:38,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955220633] [2021-05-21 15:53:38,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:38,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:38,819 INFO L87 Difference]: Start difference. First operand 3878 states and 10718 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:39,395 INFO L93 Difference]: Finished difference Result 5646 states and 14457 transitions. [2021-05-21 15:53:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:53:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:39,401 INFO L225 Difference]: With dead ends: 5646 [2021-05-21 15:53:39,401 INFO L226 Difference]: Without dead ends: 5376 [2021-05-21 15:53:39,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 576.3ms TimeCoverageRelationStatistics Valid=954, Invalid=3078, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:53:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-05-21 15:53:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 3953. [2021-05-21 15:53:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7689777327935223) internal successors, (10943), 3952 states have internal predecessors, (10943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10943 transitions. [2021-05-21 15:53:39,442 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10943 transitions. Word has length 150 [2021-05-21 15:53:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:39,442 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10943 transitions. [2021-05-21 15:53:39,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10943 transitions. [2021-05-21 15:53:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:39,445 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:39,445 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-05-21 15:53:39,645 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash 623075291, now seen corresponding path program 281 times [2021-05-21 15:53:39,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143603227] [2021-05-21 15:53:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:39,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:39,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143603227] [2021-05-21 15:53:39,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143603227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:39,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56930551] [2021-05-21 15:53:39,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:39,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:53:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:40,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56930551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:40,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:40,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:40,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513584229] [2021-05-21 15:53:40,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:40,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:40,079 INFO L87 Difference]: Start difference. First operand 3953 states and 10943 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:40,769 INFO L93 Difference]: Finished difference Result 5671 states and 14582 transitions. [2021-05-21 15:53:40,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:53:40,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:40,774 INFO L225 Difference]: With dead ends: 5671 [2021-05-21 15:53:40,774 INFO L226 Difference]: Without dead ends: 5401 [2021-05-21 15:53:40,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 710.3ms TimeCoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:53:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-05-21 15:53:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4028. [2021-05-21 15:53:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7732803575862923) internal successors, (11168), 4027 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11168 transitions. [2021-05-21 15:53:40,812 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11168 transitions. Word has length 150 [2021-05-21 15:53:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:40,812 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11168 transitions. [2021-05-21 15:53:40,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11168 transitions. [2021-05-21 15:53:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:40,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:40,815 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:41,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-05-21 15:53:41,016 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1247450441, now seen corresponding path program 282 times [2021-05-21 15:53:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:41,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698055986] [2021-05-21 15:53:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:41,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:41,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698055986] [2021-05-21 15:53:41,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698055986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:41,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045964524] [2021-05-21 15:53:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:41,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:53:41,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:41,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045964524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:41,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:41,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:41,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261163144] [2021-05-21 15:53:41,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:41,432 INFO L87 Difference]: Start difference. First operand 4028 states and 11168 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:42,166 INFO L93 Difference]: Finished difference Result 5696 states and 14707 transitions. [2021-05-21 15:53:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:53:42,166 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:42,170 INFO L225 Difference]: With dead ends: 5696 [2021-05-21 15:53:42,170 INFO L226 Difference]: Without dead ends: 5426 [2021-05-21 15:53:42,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=1019, Invalid=3271, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:53:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-05-21 15:53:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4103. [2021-05-21 15:53:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.7774256460263285) internal successors, (11393), 4102 states have internal predecessors, (11393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11393 transitions. [2021-05-21 15:53:42,210 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11393 transitions. Word has length 150 [2021-05-21 15:53:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:42,210 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11393 transitions. [2021-05-21 15:53:42,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11393 transitions. [2021-05-21 15:53:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:42,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:42,213 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:42,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:42,428 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2056502297, now seen corresponding path program 283 times [2021-05-21 15:53:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:42,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732454701] [2021-05-21 15:53:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:42,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:42,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732454701] [2021-05-21 15:53:42,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732454701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:42,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238326416] [2021-05-21 15:53:42,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:42,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238326416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:42,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:42,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:42,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041427908] [2021-05-21 15:53:42,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:42,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:42,872 INFO L87 Difference]: Start difference. First operand 4103 states and 11393 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:43,721 INFO L93 Difference]: Finished difference Result 5721 states and 14832 transitions. [2021-05-21 15:53:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:53:43,721 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:43,726 INFO L225 Difference]: With dead ends: 5721 [2021-05-21 15:53:43,726 INFO L226 Difference]: Without dead ends: 5451 [2021-05-21 15:53:43,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 823.6ms TimeCoverageRelationStatistics Valid=1134, Invalid=3696, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:53:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-05-21 15:53:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4178. [2021-05-21 15:53:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.7814220732583195) internal successors, (11618), 4177 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11618 transitions. [2021-05-21 15:53:43,769 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11618 transitions. Word has length 150 [2021-05-21 15:53:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:43,769 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11618 transitions. [2021-05-21 15:53:43,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11618 transitions. [2021-05-21 15:53:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:43,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:43,772 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:43,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:43,988 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash 664552199, now seen corresponding path program 284 times [2021-05-21 15:53:43,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:43,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656739187] [2021-05-21 15:53:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:44,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:44,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656739187] [2021-05-21 15:53:44,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656739187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:44,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2740302] [2021-05-21 15:53:44,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:44,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:44,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:44,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2740302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:44,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:44,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:44,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213408277] [2021-05-21 15:53:44,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:44,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:44,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:44,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:44,614 INFO L87 Difference]: Start difference. First operand 4178 states and 11618 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:45,289 INFO L93 Difference]: Finished difference Result 5746 states and 14957 transitions. [2021-05-21 15:53:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:53:45,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:45,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:45,295 INFO L225 Difference]: With dead ends: 5746 [2021-05-21 15:53:45,295 INFO L226 Difference]: Without dead ends: 5476 [2021-05-21 15:53:45,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 752.8ms TimeCoverageRelationStatistics Valid=1100, Invalid=3456, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:53:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-05-21 15:53:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4253. [2021-05-21 15:53:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.785277516462841) internal successors, (11843), 4252 states have internal predecessors, (11843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11843 transitions. [2021-05-21 15:53:45,338 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11843 transitions. Word has length 150 [2021-05-21 15:53:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:45,338 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11843 transitions. [2021-05-21 15:53:45,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11843 transitions. [2021-05-21 15:53:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:45,341 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:45,341 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:45,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:45,541 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 419474903, now seen corresponding path program 285 times [2021-05-21 15:53:45,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:45,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967701970] [2021-05-21 15:53:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967701970] [2021-05-21 15:53:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967701970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702263618] [2021-05-21 15:53:45,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:45,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:53:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:45,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702263618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:45,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:45,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:45,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824488019] [2021-05-21 15:53:45,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:45,965 INFO L87 Difference]: Start difference. First operand 4253 states and 11843 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:46,768 INFO L93 Difference]: Finished difference Result 5771 states and 15082 transitions. [2021-05-21 15:53:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:53:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:46,773 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 15:53:46,773 INFO L226 Difference]: Without dead ends: 5501 [2021-05-21 15:53:46,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=1223, Invalid=3889, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:53:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-05-21 15:53:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4328. [2021-05-21 15:53:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.7889993066789924) internal successors, (12068), 4327 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12068 transitions. [2021-05-21 15:53:46,815 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12068 transitions. Word has length 150 [2021-05-21 15:53:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:46,815 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12068 transitions. [2021-05-21 15:53:46,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12068 transitions. [2021-05-21 15:53:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:46,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:46,819 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:47,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:47,019 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:47,020 INFO L82 PathProgramCache]: Analyzing trace with hash 42624581, now seen corresponding path program 286 times [2021-05-21 15:53:47,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:47,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974139322] [2021-05-21 15:53:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:47,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974139322] [2021-05-21 15:53:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974139322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:47,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042511132] [2021-05-21 15:53:47,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:47,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:47,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:47,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042511132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:47,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:47,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:47,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101122511] [2021-05-21 15:53:47,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:47,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:47,449 INFO L87 Difference]: Start difference. First operand 4328 states and 12068 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:48,095 INFO L93 Difference]: Finished difference Result 5796 states and 15207 transitions. [2021-05-21 15:53:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:53:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:48,100 INFO L225 Difference]: With dead ends: 5796 [2021-05-21 15:53:48,100 INFO L226 Difference]: Without dead ends: 5526 [2021-05-21 15:53:48,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=1197, Invalid=3633, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:53:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-05-21 15:53:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4403. [2021-05-21 15:53:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.7925942753293955) internal successors, (12293), 4402 states have internal predecessors, (12293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12293 transitions. [2021-05-21 15:53:48,145 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12293 transitions. Word has length 150 [2021-05-21 15:53:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:48,145 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12293 transitions. [2021-05-21 15:53:48,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12293 transitions. [2021-05-21 15:53:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:48,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:48,148 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:48,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:48,349 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1369380117, now seen corresponding path program 287 times [2021-05-21 15:53:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:48,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52062327] [2021-05-21 15:53:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:48,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:48,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52062327] [2021-05-21 15:53:48,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52062327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:48,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871131534] [2021-05-21 15:53:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:48,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:53:48,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:48,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871131534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:48,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:48,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982671343] [2021-05-21 15:53:48,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:48,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:48,781 INFO L87 Difference]: Start difference. First operand 4403 states and 12293 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:49,598 INFO L93 Difference]: Finished difference Result 5821 states and 15332 transitions. [2021-05-21 15:53:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:53:49,599 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:49,604 INFO L225 Difference]: With dead ends: 5821 [2021-05-21 15:53:49,604 INFO L226 Difference]: Without dead ends: 5551 [2021-05-21 15:53:49,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 811.9ms TimeCoverageRelationStatistics Valid=1328, Invalid=4074, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:53:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-05-21 15:53:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4478. [2021-05-21 15:53:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.796068796068796) internal successors, (12518), 4477 states have internal predecessors, (12518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12518 transitions. [2021-05-21 15:53:49,649 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12518 transitions. Word has length 150 [2021-05-21 15:53:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:49,649 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12518 transitions. [2021-05-21 15:53:49,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12518 transitions. [2021-05-21 15:53:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:49,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:49,652 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:49,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:49,853 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1823596291, now seen corresponding path program 288 times [2021-05-21 15:53:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:49,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282854884] [2021-05-21 15:53:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:50,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:50,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282854884] [2021-05-21 15:53:50,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282854884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:50,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321807863] [2021-05-21 15:53:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:50,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:53:50,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321807863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:50,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:50,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:50,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101389197] [2021-05-21 15:53:50,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:50,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:50,262 INFO L87 Difference]: Start difference. First operand 4478 states and 12518 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:50,955 INFO L93 Difference]: Finished difference Result 5846 states and 15457 transitions. [2021-05-21 15:53:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:53:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:50,961 INFO L225 Difference]: With dead ends: 5846 [2021-05-21 15:53:50,961 INFO L226 Difference]: Without dead ends: 5576 [2021-05-21 15:53:50,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:53:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-05-21 15:53:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4553. [2021-05-21 15:53:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.7994288224956065) internal successors, (12743), 4552 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12743 transitions. [2021-05-21 15:53:51,006 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12743 transitions. Word has length 150 [2021-05-21 15:53:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:51,006 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12743 transitions. [2021-05-21 15:53:51,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12743 transitions. [2021-05-21 15:53:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:51,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:51,010 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:51,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:51,210 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1472474669, now seen corresponding path program 289 times [2021-05-21 15:53:51,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:51,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223596308] [2021-05-21 15:53:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:51,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223596308] [2021-05-21 15:53:51,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223596308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384679814] [2021-05-21 15:53:51,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384679814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:51,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:51,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814774737] [2021-05-21 15:53:51,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:51,617 INFO L87 Difference]: Start difference. First operand 4553 states and 12743 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:52,499 INFO L93 Difference]: Finished difference Result 5871 states and 15582 transitions. [2021-05-21 15:53:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:53:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:52,504 INFO L225 Difference]: With dead ends: 5871 [2021-05-21 15:53:52,504 INFO L226 Difference]: Without dead ends: 5601 [2021-05-21 15:53:52,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:53:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-05-21 15:53:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4628. [2021-05-21 15:53:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.802679922195807) internal successors, (12968), 4627 states have internal predecessors, (12968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 12968 transitions. [2021-05-21 15:53:52,550 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 12968 transitions. Word has length 150 [2021-05-21 15:53:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:52,550 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 12968 transitions. [2021-05-21 15:53:52,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 12968 transitions. [2021-05-21 15:53:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:52,553 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:52,553 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:52,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:52,754 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash 943164737, now seen corresponding path program 290 times [2021-05-21 15:53:52,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:52,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31413766] [2021-05-21 15:53:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:52,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:52,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31413766] [2021-05-21 15:53:52,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31413766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:52,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649893327] [2021-05-21 15:53:52,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:53,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:53:53,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:53,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:53,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649893327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:53,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:53,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753041319] [2021-05-21 15:53:53,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:53,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:53,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:53,140 INFO L87 Difference]: Start difference. First operand 4628 states and 12968 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:53,871 INFO L93 Difference]: Finished difference Result 5896 states and 15707 transitions. [2021-05-21 15:53:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:53:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:53,877 INFO L225 Difference]: With dead ends: 5896 [2021-05-21 15:53:53,877 INFO L226 Difference]: Without dead ends: 5626 [2021-05-21 15:53:53,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 711.8ms TimeCoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:53:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-05-21 15:53:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4703. [2021-05-21 15:53:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8058273075287112) internal successors, (13193), 4702 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13193 transitions. [2021-05-21 15:53:53,956 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13193 transitions. Word has length 150 [2021-05-21 15:53:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:53,956 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13193 transitions. [2021-05-21 15:53:53,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13193 transitions. [2021-05-21 15:53:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:53,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:53,960 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:54,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-05-21 15:53:54,160 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1321483247, now seen corresponding path program 291 times [2021-05-21 15:53:54,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:54,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151950554] [2021-05-21 15:53:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:54,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151950554] [2021-05-21 15:53:54,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151950554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:54,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347196969] [2021-05-21 15:53:54,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:54,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:53:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:54,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347196969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:54,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:54,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:54,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673192769] [2021-05-21 15:53:54,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:54,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:54,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:54,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:54,573 INFO L87 Difference]: Start difference. First operand 4703 states and 13193 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:55,508 INFO L93 Difference]: Finished difference Result 5921 states and 15832 transitions. [2021-05-21 15:53:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:53:55,508 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:55,514 INFO L225 Difference]: With dead ends: 5921 [2021-05-21 15:53:55,514 INFO L226 Difference]: Without dead ends: 5651 [2021-05-21 15:53:55,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 898.0ms TimeCoverageRelationStatistics Valid=1586, Invalid=4420, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:53:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-05-21 15:53:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4778. [2021-05-21 15:53:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 2.808875863512665) internal successors, (13418), 4777 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 13418 transitions. [2021-05-21 15:53:55,571 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 13418 transitions. Word has length 150 [2021-05-21 15:53:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:55,571 INFO L482 AbstractCegarLoop]: Abstraction has 4778 states and 13418 transitions. [2021-05-21 15:53:55,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 13418 transitions. [2021-05-21 15:53:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:55,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:55,575 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:55,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:55,775 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash -707243777, now seen corresponding path program 292 times [2021-05-21 15:53:55,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:55,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998788047] [2021-05-21 15:53:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:55,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998788047] [2021-05-21 15:53:55,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998788047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744345266] [2021-05-21 15:53:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:56,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:53:56,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:56,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:56,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744345266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:56,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:56,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:56,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232543610] [2021-05-21 15:53:56,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:56,191 INFO L87 Difference]: Start difference. First operand 4778 states and 13418 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:56,967 INFO L93 Difference]: Finished difference Result 5991 states and 16077 transitions. [2021-05-21 15:53:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:53:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:56,973 INFO L225 Difference]: With dead ends: 5991 [2021-05-21 15:53:56,973 INFO L226 Difference]: Without dead ends: 5721 [2021-05-21 15:53:56,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=1584, Invalid=4116, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:53:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-05-21 15:53:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4853. [2021-05-21 15:53:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 4852 states have (on average 2.814921681780709) internal successors, (13658), 4852 states have internal predecessors, (13658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 13658 transitions. [2021-05-21 15:53:57,025 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 13658 transitions. Word has length 150 [2021-05-21 15:53:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:57,025 INFO L482 AbstractCegarLoop]: Abstraction has 4853 states and 13658 transitions. [2021-05-21 15:53:57,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 13658 transitions. [2021-05-21 15:53:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:57,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:57,029 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:57,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-21 15:53:57,230 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481231, now seen corresponding path program 293 times [2021-05-21 15:53:57,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:57,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938090459] [2021-05-21 15:53:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:57,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:57,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938090459] [2021-05-21 15:53:57,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938090459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:57,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514726204] [2021-05-21 15:53:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:57,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:53:57,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:57,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:57,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514726204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:57,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:57,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-05-21 15:53:57,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223013251] [2021-05-21 15:53:57,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:53:57,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:57,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:53:57,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:53:57,631 INFO L87 Difference]: Start difference. First operand 4853 states and 13658 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:53:58,665 INFO L93 Difference]: Finished difference Result 6569 states and 17703 transitions. [2021-05-21 15:53:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:53:58,665 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:53:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:53:58,671 INFO L225 Difference]: With dead ends: 6569 [2021-05-21 15:53:58,671 INFO L226 Difference]: Without dead ends: 5946 [2021-05-21 15:53:58,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 981.9ms TimeCoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:53:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-05-21 15:53:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4928. [2021-05-21 15:53:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.8187538055611934) internal successors, (13888), 4927 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13888 transitions. [2021-05-21 15:53:58,725 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13888 transitions. Word has length 150 [2021-05-21 15:53:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:53:58,725 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13888 transitions. [2021-05-21 15:53:58,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:53:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13888 transitions. [2021-05-21 15:53:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:53:58,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:53:58,729 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:53:58,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-05-21 15:53:58,930 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:53:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:53:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash 839833629, now seen corresponding path program 294 times [2021-05-21 15:53:58,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:53:58,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021202068] [2021-05-21 15:53:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:53:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:53:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:59,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:53:59,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021202068] [2021-05-21 15:53:59,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021202068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:59,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796974006] [2021-05-21 15:53:59,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:53:59,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:53:59,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:53:59,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:53:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:53:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:53:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796974006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:53:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:53:59,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-05-21 15:53:59,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611045523] [2021-05-21 15:53:59,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 15:53:59,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:53:59,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 15:53:59,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:53:59,317 INFO L87 Difference]: Start difference. First operand 4928 states and 13888 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:00,122 INFO L93 Difference]: Finished difference Result 6798 states and 18421 transitions. [2021-05-21 15:54:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:54:00,122 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:54:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:00,128 INFO L225 Difference]: With dead ends: 6798 [2021-05-21 15:54:00,128 INFO L226 Difference]: Without dead ends: 6528 [2021-05-21 15:54:00,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 759.7ms TimeCoverageRelationStatistics Valid=1746, Invalid=4260, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:54:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-05-21 15:54:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 5108. [2021-05-21 15:54:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.8288623457998825) internal successors, (14447), 5107 states have internal predecessors, (14447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 14447 transitions. [2021-05-21 15:54:00,176 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 14447 transitions. Word has length 150 [2021-05-21 15:54:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:00,176 INFO L482 AbstractCegarLoop]: Abstraction has 5108 states and 14447 transitions. [2021-05-21 15:54:00,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 14447 transitions. [2021-05-21 15:54:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-21 15:54:00,179 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:00,179 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-05-21 15:54:00,380 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash 862176879, now seen corresponding path program 295 times [2021-05-21 15:54:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:00,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887575161] [2021-05-21 15:54:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:00,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:00,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887575161] [2021-05-21 15:54:00,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887575161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:00,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056884392] [2021-05-21 15:54:00,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:54:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:00,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056884392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:00,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:00,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-05-21 15:54:00,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134575816] [2021-05-21 15:54:00,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:00,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:00,780 INFO L87 Difference]: Start difference. First operand 5108 states and 14447 transitions. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:01,852 INFO L93 Difference]: Finished difference Result 6621 states and 17921 transitions. [2021-05-21 15:54:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:54:01,853 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-05-21 15:54:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:01,857 INFO L225 Difference]: With dead ends: 6621 [2021-05-21 15:54:01,857 INFO L226 Difference]: Without dead ends: 6046 [2021-05-21 15:54:01,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=1989, Invalid=5321, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 15:54:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2021-05-21 15:54:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 3403. [2021-05-21 15:54:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 2.7389770723104054) internal successors, (9318), 3402 states have internal predecessors, (9318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 9318 transitions. [2021-05-21 15:54:01,893 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 9318 transitions. Word has length 150 [2021-05-21 15:54:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:01,893 INFO L482 AbstractCegarLoop]: Abstraction has 3403 states and 9318 transitions. [2021-05-21 15:54:01,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 9318 transitions. [2021-05-21 15:54:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:01,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:01,895 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:02,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:02,096 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash -652298224, now seen corresponding path program 296 times [2021-05-21 15:54:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:02,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275947027] [2021-05-21 15:54:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:02,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275947027] [2021-05-21 15:54:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275947027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:02,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455660840] [2021-05-21 15:54:02,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:02,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:02,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:02,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455660840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:02,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:02,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688144219] [2021-05-21 15:54:02,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:02,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:02,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:02,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:02,577 INFO L87 Difference]: Start difference. First operand 3403 states and 9318 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:03,042 INFO L93 Difference]: Finished difference Result 5021 states and 12757 transitions. [2021-05-21 15:54:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:54:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:03,047 INFO L225 Difference]: With dead ends: 5021 [2021-05-21 15:54:03,047 INFO L226 Difference]: Without dead ends: 4751 [2021-05-21 15:54:03,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:54:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-05-21 15:54:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3478. [2021-05-21 15:54:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7446074201898187) internal successors, (9543), 3477 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9543 transitions. [2021-05-21 15:54:03,080 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9543 transitions. Word has length 155 [2021-05-21 15:54:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:03,080 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9543 transitions. [2021-05-21 15:54:03,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9543 transitions. [2021-05-21 15:54:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:03,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:03,083 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:03,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-05-21 15:54:03,283 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash 814385888, now seen corresponding path program 297 times [2021-05-21 15:54:03,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:03,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143707999] [2021-05-21 15:54:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:03,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143707999] [2021-05-21 15:54:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143707999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650383468] [2021-05-21 15:54:03,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:03,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:54:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:03,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650383468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:03,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:03,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:03,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398310126] [2021-05-21 15:54:03,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:03,820 INFO L87 Difference]: Start difference. First operand 3478 states and 9543 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:04,328 INFO L93 Difference]: Finished difference Result 5641 states and 14072 transitions. [2021-05-21 15:54:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:54:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:04,334 INFO L225 Difference]: With dead ends: 5641 [2021-05-21 15:54:04,334 INFO L226 Difference]: Without dead ends: 5371 [2021-05-21 15:54:04,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:54:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-05-21 15:54:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3553. [2021-05-21 15:54:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3552 states have (on average 2.75) internal successors, (9768), 3552 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 9768 transitions. [2021-05-21 15:54:04,369 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 9768 transitions. Word has length 155 [2021-05-21 15:54:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:04,369 INFO L482 AbstractCegarLoop]: Abstraction has 3553 states and 9768 transitions. [2021-05-21 15:54:04,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 9768 transitions. [2021-05-21 15:54:04,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:04,372 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:04,372 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:04,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:04,572 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash 679164494, now seen corresponding path program 298 times [2021-05-21 15:54:04,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:04,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29055916] [2021-05-21 15:54:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:04,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29055916] [2021-05-21 15:54:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29055916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485578550] [2021-05-21 15:54:04,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:04,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:04,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:05,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485578550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:05,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:05,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:05,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389269594] [2021-05-21 15:54:05,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:05,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:05,032 INFO L87 Difference]: Start difference. First operand 3553 states and 9768 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:05,547 INFO L93 Difference]: Finished difference Result 5671 states and 14207 transitions. [2021-05-21 15:54:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:54:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:05,553 INFO L225 Difference]: With dead ends: 5671 [2021-05-21 15:54:05,553 INFO L226 Difference]: Without dead ends: 5401 [2021-05-21 15:54:05,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 582.2ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 15:54:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-05-21 15:54:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 3628. [2021-05-21 15:54:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.7551695616211744) internal successors, (9993), 3627 states have internal predecessors, (9993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9993 transitions. [2021-05-21 15:54:05,611 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9993 transitions. Word has length 155 [2021-05-21 15:54:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:05,611 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9993 transitions. [2021-05-21 15:54:05,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9993 transitions. [2021-05-21 15:54:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:05,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:05,614 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:05,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:05,815 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:05,815 INFO L82 PathProgramCache]: Analyzing trace with hash -197570274, now seen corresponding path program 299 times [2021-05-21 15:54:05,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:05,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740905405] [2021-05-21 15:54:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:06,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:06,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740905405] [2021-05-21 15:54:06,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740905405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:06,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937618687] [2021-05-21 15:54:06,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:06,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:54:06,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:06,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937618687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:06,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:06,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:06,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868690362] [2021-05-21 15:54:06,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:06,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:06,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:06,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:06,297 INFO L87 Difference]: Start difference. First operand 3628 states and 9993 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:06,869 INFO L93 Difference]: Finished difference Result 5696 states and 14332 transitions. [2021-05-21 15:54:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:54:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:06,875 INFO L225 Difference]: With dead ends: 5696 [2021-05-21 15:54:06,875 INFO L226 Difference]: Without dead ends: 5426 [2021-05-21 15:54:06,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:54:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-05-21 15:54:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3703. [2021-05-21 15:54:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.760129659643436) internal successors, (10218), 3702 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 10218 transitions. [2021-05-21 15:54:06,916 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 10218 transitions. Word has length 155 [2021-05-21 15:54:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:06,917 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 10218 transitions. [2021-05-21 15:54:06,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 10218 transitions. [2021-05-21 15:54:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:06,919 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:06,920 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:07,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:07,120 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:07,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1934896628, now seen corresponding path program 300 times [2021-05-21 15:54:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299540199] [2021-05-21 15:54:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299540199] [2021-05-21 15:54:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299540199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103094048] [2021-05-21 15:54:07,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:07,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:54:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:07,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103094048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:07,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:07,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:07,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887299531] [2021-05-21 15:54:07,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:07,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:07,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:07,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:07,603 INFO L87 Difference]: Start difference. First operand 3703 states and 10218 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:08,150 INFO L93 Difference]: Finished difference Result 5721 states and 14457 transitions. [2021-05-21 15:54:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:54:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:08,155 INFO L225 Difference]: With dead ends: 5721 [2021-05-21 15:54:08,155 INFO L226 Difference]: Without dead ends: 5451 [2021-05-21 15:54:08,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 630.0ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:54:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-05-21 15:54:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 3778. [2021-05-21 15:54:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.7648927720413026) internal successors, (10443), 3777 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10443 transitions. [2021-05-21 15:54:08,195 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10443 transitions. Word has length 155 [2021-05-21 15:54:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:08,195 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10443 transitions. [2021-05-21 15:54:08,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10443 transitions. [2021-05-21 15:54:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:08,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:08,198 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:08,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-05-21 15:54:08,398 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash -570348324, now seen corresponding path program 301 times [2021-05-21 15:54:08,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:08,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370397726] [2021-05-21 15:54:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:08,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:08,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370397726] [2021-05-21 15:54:08,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370397726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:08,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117478132] [2021-05-21 15:54:08,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:08,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:08,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117478132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:08,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:08,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:08,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378137649] [2021-05-21 15:54:08,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:08,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:08,862 INFO L87 Difference]: Start difference. First operand 3778 states and 10443 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:09,476 INFO L93 Difference]: Finished difference Result 5746 states and 14582 transitions. [2021-05-21 15:54:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:54:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:09,482 INFO L225 Difference]: With dead ends: 5746 [2021-05-21 15:54:09,482 INFO L226 Difference]: Without dead ends: 5476 [2021-05-21 15:54:09,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 673.3ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:54:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-05-21 15:54:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3853. [2021-05-21 15:54:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 2.769470404984424) internal successors, (10668), 3852 states have internal predecessors, (10668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 10668 transitions. [2021-05-21 15:54:09,540 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 10668 transitions. Word has length 155 [2021-05-21 15:54:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:09,540 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 10668 transitions. [2021-05-21 15:54:09,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 10668 transitions. [2021-05-21 15:54:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:09,543 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:09,543 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:09,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-05-21 15:54:09,743 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1447386954, now seen corresponding path program 302 times [2021-05-21 15:54:09,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:09,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274774036] [2021-05-21 15:54:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:09,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274774036] [2021-05-21 15:54:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274774036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767835899] [2021-05-21 15:54:09,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:10,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:10,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767835899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:10,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:10,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:10,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088550906] [2021-05-21 15:54:10,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:10,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:10,198 INFO L87 Difference]: Start difference. First operand 3853 states and 10668 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:10,760 INFO L93 Difference]: Finished difference Result 5771 states and 14707 transitions. [2021-05-21 15:54:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:54:10,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:10,766 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 15:54:10,766 INFO L226 Difference]: Without dead ends: 5501 [2021-05-21 15:54:10,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 624.1ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:54:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-05-21 15:54:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 3928. [2021-05-21 15:54:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.7738731856378913) internal successors, (10893), 3927 states have internal predecessors, (10893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10893 transitions. [2021-05-21 15:54:10,806 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10893 transitions. Word has length 155 [2021-05-21 15:54:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:10,806 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10893 transitions. [2021-05-21 15:54:10,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10893 transitions. [2021-05-21 15:54:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:10,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:10,809 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:11,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-05-21 15:54:11,009 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 548863514, now seen corresponding path program 303 times [2021-05-21 15:54:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:11,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61361698] [2021-05-21 15:54:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:11,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:11,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61361698] [2021-05-21 15:54:11,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61361698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:11,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553976663] [2021-05-21 15:54:11,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:11,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:54:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553976663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:11,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:11,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:11,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752413420] [2021-05-21 15:54:11,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:11,501 INFO L87 Difference]: Start difference. First operand 3928 states and 10893 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:12,155 INFO L93 Difference]: Finished difference Result 5796 states and 14832 transitions. [2021-05-21 15:54:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:54:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:12,161 INFO L225 Difference]: With dead ends: 5796 [2021-05-21 15:54:12,161 INFO L226 Difference]: Without dead ends: 5526 [2021-05-21 15:54:12,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=1093, Invalid=3599, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:54:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-05-21 15:54:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4003. [2021-05-21 15:54:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7781109445277363) internal successors, (11118), 4002 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11118 transitions. [2021-05-21 15:54:12,201 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11118 transitions. Word has length 155 [2021-05-21 15:54:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:12,201 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11118 transitions. [2021-05-21 15:54:12,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11118 transitions. [2021-05-21 15:54:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:12,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:12,204 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:12,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-05-21 15:54:12,405 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:12,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1066089976, now seen corresponding path program 304 times [2021-05-21 15:54:12,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:12,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666386229] [2021-05-21 15:54:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:12,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666386229] [2021-05-21 15:54:12,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666386229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496195758] [2021-05-21 15:54:12,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:12,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:12,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:12,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496195758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:12,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:12,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064942284] [2021-05-21 15:54:12,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:12,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:12,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:12,836 INFO L87 Difference]: Start difference. First operand 4003 states and 11118 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:13,464 INFO L93 Difference]: Finished difference Result 5821 states and 14957 transitions. [2021-05-21 15:54:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:54:13,464 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:13,468 INFO L225 Difference]: With dead ends: 5821 [2021-05-21 15:54:13,468 INFO L226 Difference]: Without dead ends: 5551 [2021-05-21 15:54:13,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:54:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-05-21 15:54:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4078. [2021-05-21 15:54:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.7821927888153053) internal successors, (11343), 4077 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11343 transitions. [2021-05-21 15:54:13,507 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11343 transitions. Word has length 155 [2021-05-21 15:54:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:13,508 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11343 transitions. [2021-05-21 15:54:13,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11343 transitions. [2021-05-21 15:54:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:13,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:13,511 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:13,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-05-21 15:54:13,711 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1446533928, now seen corresponding path program 305 times [2021-05-21 15:54:13,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:13,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912002597] [2021-05-21 15:54:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:13,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912002597] [2021-05-21 15:54:13,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912002597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275127237] [2021-05-21 15:54:13,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:13,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:54:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:14,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275127237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:14,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:14,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:14,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768514446] [2021-05-21 15:54:14,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:14,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:14,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:14,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:14,159 INFO L87 Difference]: Start difference. First operand 4078 states and 11343 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:14,863 INFO L93 Difference]: Finished difference Result 5846 states and 15082 transitions. [2021-05-21 15:54:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:54:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:14,869 INFO L225 Difference]: With dead ends: 5846 [2021-05-21 15:54:14,869 INFO L226 Difference]: Without dead ends: 5576 [2021-05-21 15:54:14,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:54:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-05-21 15:54:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4153. [2021-05-21 15:54:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.786127167630058) internal successors, (11568), 4152 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11568 transitions. [2021-05-21 15:54:14,910 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11568 transitions. Word has length 155 [2021-05-21 15:54:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:14,910 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11568 transitions. [2021-05-21 15:54:14,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11568 transitions. [2021-05-21 15:54:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:14,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:14,913 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:15,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-05-21 15:54:15,114 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash -822158778, now seen corresponding path program 306 times [2021-05-21 15:54:15,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:15,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786740009] [2021-05-21 15:54:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:15,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786740009] [2021-05-21 15:54:15,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786740009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324735397] [2021-05-21 15:54:15,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:15,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:54:15,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:15,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:15,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324735397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:15,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:15,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:15,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585963842] [2021-05-21 15:54:15,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:15,558 INFO L87 Difference]: Start difference. First operand 4153 states and 11568 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:16,191 INFO L93 Difference]: Finished difference Result 5871 states and 15207 transitions. [2021-05-21 15:54:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:54:16,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:16,197 INFO L225 Difference]: With dead ends: 5871 [2021-05-21 15:54:16,197 INFO L226 Difference]: Without dead ends: 5601 [2021-05-21 15:54:16,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:54:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-05-21 15:54:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-05-21 15:54:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7899219304471257) internal successors, (11793), 4227 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11793 transitions. [2021-05-21 15:54:16,238 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11793 transitions. Word has length 155 [2021-05-21 15:54:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:16,238 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11793 transitions. [2021-05-21 15:54:16,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11793 transitions. [2021-05-21 15:54:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:16,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:16,241 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:16,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-05-21 15:54:16,442 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:16,442 INFO L82 PathProgramCache]: Analyzing trace with hash -13106922, now seen corresponding path program 307 times [2021-05-21 15:54:16,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:16,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549343671] [2021-05-21 15:54:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:16,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:16,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549343671] [2021-05-21 15:54:16,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549343671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:16,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875111226] [2021-05-21 15:54:16,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:16,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875111226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:16,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:16,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:16,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102658556] [2021-05-21 15:54:16,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:16,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:16,899 INFO L87 Difference]: Start difference. First operand 4228 states and 11793 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:17,675 INFO L93 Difference]: Finished difference Result 5896 states and 15332 transitions. [2021-05-21 15:54:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:54:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:17,680 INFO L225 Difference]: With dead ends: 5896 [2021-05-21 15:54:17,680 INFO L226 Difference]: Without dead ends: 5626 [2021-05-21 15:54:17,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 782.5ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:54:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-05-21 15:54:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4303. [2021-05-21 15:54:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.793584379358438) internal successors, (12018), 4302 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 12018 transitions. [2021-05-21 15:54:17,723 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 12018 transitions. Word has length 155 [2021-05-21 15:54:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:17,723 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 12018 transitions. [2021-05-21 15:54:17,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 12018 transitions. [2021-05-21 15:54:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:17,726 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:17,726 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:17,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:17,926 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1405057020, now seen corresponding path program 308 times [2021-05-21 15:54:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:17,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757615259] [2021-05-21 15:54:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:18,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:18,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757615259] [2021-05-21 15:54:18,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757615259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:18,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359182289] [2021-05-21 15:54:18,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:18,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:18,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359182289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:18,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:18,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821828597] [2021-05-21 15:54:18,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:18,346 INFO L87 Difference]: Start difference. First operand 4303 states and 12018 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:19,006 INFO L93 Difference]: Finished difference Result 5921 states and 15457 transitions. [2021-05-21 15:54:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:54:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:19,011 INFO L225 Difference]: With dead ends: 5921 [2021-05-21 15:54:19,011 INFO L226 Difference]: Without dead ends: 5651 [2021-05-21 15:54:19,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:54:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-05-21 15:54:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4378. [2021-05-21 15:54:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7971213159698425) internal successors, (12243), 4377 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12243 transitions. [2021-05-21 15:54:19,078 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12243 transitions. Word has length 155 [2021-05-21 15:54:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:19,078 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12243 transitions. [2021-05-21 15:54:19,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12243 transitions. [2021-05-21 15:54:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:19,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:19,081 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:19,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-05-21 15:54:19,281 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:19,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1650134316, now seen corresponding path program 309 times [2021-05-21 15:54:19,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:19,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143889585] [2021-05-21 15:54:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:19,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143889585] [2021-05-21 15:54:19,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143889585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50859830] [2021-05-21 15:54:19,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:19,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:54:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:19,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50859830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:19,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:19,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:19,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060336992] [2021-05-21 15:54:19,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:19,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:19,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:19,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:19,723 INFO L87 Difference]: Start difference. First operand 4378 states and 12243 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:20,515 INFO L93 Difference]: Finished difference Result 5946 states and 15582 transitions. [2021-05-21 15:54:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:54:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:20,520 INFO L225 Difference]: With dead ends: 5946 [2021-05-21 15:54:20,520 INFO L226 Difference]: Without dead ends: 5676 [2021-05-21 15:54:20,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=1333, Invalid=4217, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:54:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-05-21 15:54:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4453. [2021-05-21 15:54:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.8005390835579513) internal successors, (12468), 4452 states have internal predecessors, (12468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12468 transitions. [2021-05-21 15:54:20,569 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12468 transitions. Word has length 155 [2021-05-21 15:54:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:20,570 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12468 transitions. [2021-05-21 15:54:20,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12468 transitions. [2021-05-21 15:54:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:20,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:20,573 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:20,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:20,773 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2026984638, now seen corresponding path program 310 times [2021-05-21 15:54:20,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:20,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095527298] [2021-05-21 15:54:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:20,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095527298] [2021-05-21 15:54:20,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095527298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791395071] [2021-05-21 15:54:20,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:21,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791395071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:21,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:21,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:21,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81681303] [2021-05-21 15:54:21,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:21,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:21,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:21,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:21,198 INFO L87 Difference]: Start difference. First operand 4453 states and 12468 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:21,955 INFO L93 Difference]: Finished difference Result 5971 states and 15707 transitions. [2021-05-21 15:54:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:54:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:21,960 INFO L225 Difference]: With dead ends: 5971 [2021-05-21 15:54:21,961 INFO L226 Difference]: Without dead ends: 5701 [2021-05-21 15:54:21,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:54:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-05-21 15:54:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4528. [2021-05-21 15:54:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.803843605036448) internal successors, (12693), 4527 states have internal predecessors, (12693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12693 transitions. [2021-05-21 15:54:22,006 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12693 transitions. Word has length 155 [2021-05-21 15:54:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:22,006 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12693 transitions. [2021-05-21 15:54:22,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:22,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12693 transitions. [2021-05-21 15:54:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:22,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:22,010 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:22,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-05-21 15:54:22,221 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash -700229102, now seen corresponding path program 311 times [2021-05-21 15:54:22,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:22,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310058456] [2021-05-21 15:54:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:22,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:22,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310058456] [2021-05-21 15:54:22,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310058456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095098408] [2021-05-21 15:54:22,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:22,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:54:22,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:22,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:22,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095098408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:22,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:22,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:22,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130805205] [2021-05-21 15:54:22,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:22,662 INFO L87 Difference]: Start difference. First operand 4528 states and 12693 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:23,546 INFO L93 Difference]: Finished difference Result 5996 states and 15832 transitions. [2021-05-21 15:54:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:54:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:23,552 INFO L225 Difference]: With dead ends: 5996 [2021-05-21 15:54:23,552 INFO L226 Difference]: Without dead ends: 5726 [2021-05-21 15:54:23,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 857.4ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:54:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-05-21 15:54:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4603. [2021-05-21 15:54:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.8070404172099086) internal successors, (12918), 4602 states have internal predecessors, (12918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12918 transitions. [2021-05-21 15:54:23,601 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12918 transitions. Word has length 155 [2021-05-21 15:54:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:23,601 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12918 transitions. [2021-05-21 15:54:23,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12918 transitions. [2021-05-21 15:54:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:23,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:23,604 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:23,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:23,805 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -246012928, now seen corresponding path program 312 times [2021-05-21 15:54:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932538135] [2021-05-21 15:54:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:24,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:24,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932538135] [2021-05-21 15:54:24,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932538135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:24,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721739823] [2021-05-21 15:54:24,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:24,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:54:24,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:24,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721739823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:24,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:24,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28911607] [2021-05-21 15:54:24,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:24,230 INFO L87 Difference]: Start difference. First operand 4603 states and 12918 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:25,000 INFO L93 Difference]: Finished difference Result 6021 states and 15957 transitions. [2021-05-21 15:54:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:54:25,000 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:25,005 INFO L225 Difference]: With dead ends: 6021 [2021-05-21 15:54:25,006 INFO L226 Difference]: Without dead ends: 5751 [2021-05-21 15:54:25,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:54:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-05-21 15:54:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4678. [2021-05-21 15:54:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.8101347017318794) internal successors, (13143), 4677 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 13143 transitions. [2021-05-21 15:54:25,055 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 13143 transitions. Word has length 155 [2021-05-21 15:54:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:25,055 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 13143 transitions. [2021-05-21 15:54:25,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 13143 transitions. [2021-05-21 15:54:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:25,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:25,058 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:25,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:25,259 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash 752883408, now seen corresponding path program 313 times [2021-05-21 15:54:25,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:25,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971239243] [2021-05-21 15:54:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:25,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:25,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971239243] [2021-05-21 15:54:25,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971239243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:25,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163826854] [2021-05-21 15:54:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:25,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163826854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:25,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:25,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991045353] [2021-05-21 15:54:25,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:25,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:25,719 INFO L87 Difference]: Start difference. First operand 4678 states and 13143 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:26,656 INFO L93 Difference]: Finished difference Result 6046 states and 16082 transitions. [2021-05-21 15:54:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:54:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:26,662 INFO L225 Difference]: With dead ends: 6046 [2021-05-21 15:54:26,662 INFO L226 Difference]: Without dead ends: 5776 [2021-05-21 15:54:26,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 881.3ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:54:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-05-21 15:54:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4753. [2021-05-21 15:54:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.813131313131313) internal successors, (13368), 4752 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13368 transitions. [2021-05-21 15:54:26,712 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13368 transitions. Word has length 155 [2021-05-21 15:54:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:26,713 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13368 transitions. [2021-05-21 15:54:26,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13368 transitions. [2021-05-21 15:54:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:26,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:26,716 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:26,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-21 15:54:26,917 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1126444482, now seen corresponding path program 314 times [2021-05-21 15:54:26,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:26,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160684939] [2021-05-21 15:54:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:27,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160684939] [2021-05-21 15:54:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160684939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:27,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615021003] [2021-05-21 15:54:27,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:27,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:27,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615021003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:27,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:27,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280673732] [2021-05-21 15:54:27,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:27,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:27,346 INFO L87 Difference]: Start difference. First operand 4753 states and 13368 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:28,166 INFO L93 Difference]: Finished difference Result 6071 states and 16207 transitions. [2021-05-21 15:54:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:54:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:28,172 INFO L225 Difference]: With dead ends: 6071 [2021-05-21 15:54:28,172 INFO L226 Difference]: Without dead ends: 5801 [2021-05-21 15:54:28,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 764.1ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:54:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-05-21 15:54:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4828. [2021-05-21 15:54:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.8160348042262275) internal successors, (13593), 4827 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13593 transitions. [2021-05-21 15:54:28,225 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13593 transitions. Word has length 155 [2021-05-21 15:54:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:28,225 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13593 transitions. [2021-05-21 15:54:28,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13593 transitions. [2021-05-21 15:54:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:28,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:28,229 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:28,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-05-21 15:54:28,429 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash 903874830, now seen corresponding path program 315 times [2021-05-21 15:54:28,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:28,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307585010] [2021-05-21 15:54:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:28,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:28,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307585010] [2021-05-21 15:54:28,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307585010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:28,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907062339] [2021-05-21 15:54:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:28,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-21 15:54:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:28,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907062339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:28,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:28,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:28,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484299747] [2021-05-21 15:54:28,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:28,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:28,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:28,869 INFO L87 Difference]: Start difference. First operand 4828 states and 13593 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:29,844 INFO L93 Difference]: Finished difference Result 6096 states and 16332 transitions. [2021-05-21 15:54:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:54:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:29,850 INFO L225 Difference]: With dead ends: 6096 [2021-05-21 15:54:29,850 INFO L226 Difference]: Without dead ends: 5826 [2021-05-21 15:54:29,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 907.5ms TimeCoverageRelationStatistics Valid=1717, Invalid=4763, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:54:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-05-21 15:54:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4903. [2021-05-21 15:54:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.8188494492044063) internal successors, (13818), 4902 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13818 transitions. [2021-05-21 15:54:29,899 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13818 transitions. Word has length 155 [2021-05-21 15:54:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:29,900 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13818 transitions. [2021-05-21 15:54:29,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13818 transitions. [2021-05-21 15:54:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:29,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:29,903 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:30,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-21 15:54:30,104 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1518114300, now seen corresponding path program 316 times [2021-05-21 15:54:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:30,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201018630] [2021-05-21 15:54:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:30,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:30,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201018630] [2021-05-21 15:54:30,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201018630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:30,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317082009] [2021-05-21 15:54:30,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:30,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:30,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317082009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:30,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:30,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:30,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516412376] [2021-05-21 15:54:30,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:30,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:30,504 INFO L87 Difference]: Start difference. First operand 4903 states and 13818 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:31,326 INFO L93 Difference]: Finished difference Result 6166 states and 16577 transitions. [2021-05-21 15:54:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:54:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:31,331 INFO L225 Difference]: With dead ends: 6166 [2021-05-21 15:54:31,331 INFO L226 Difference]: Without dead ends: 5896 [2021-05-21 15:54:31,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:54:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2021-05-21 15:54:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 4978. [2021-05-21 15:54:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.824593128390597) internal successors, (14058), 4977 states have internal predecessors, (14058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 14058 transitions. [2021-05-21 15:54:31,378 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 14058 transitions. Word has length 155 [2021-05-21 15:54:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:31,378 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 14058 transitions. [2021-05-21 15:54:31,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 14058 transitions. [2021-05-21 15:54:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:31,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:31,382 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:31,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-05-21 15:54:31,582 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash -197127988, now seen corresponding path program 317 times [2021-05-21 15:54:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:31,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282853194] [2021-05-21 15:54:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:31,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282853194] [2021-05-21 15:54:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282853194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532444925] [2021-05-21 15:54:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:31,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-21 15:54:31,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:31,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532444925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:31,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:31,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243036702] [2021-05-21 15:54:31,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:31,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:31,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:31,996 INFO L87 Difference]: Start difference. First operand 4978 states and 14058 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:33,055 INFO L93 Difference]: Finished difference Result 6744 states and 18203 transitions. [2021-05-21 15:54:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:54:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:33,060 INFO L225 Difference]: With dead ends: 6744 [2021-05-21 15:54:33,060 INFO L226 Difference]: Without dead ends: 6121 [2021-05-21 15:54:33,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 996.6ms TimeCoverageRelationStatistics Valid=1898, Invalid=5242, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:54:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-05-21 15:54:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 5053. [2021-05-21 15:54:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.8281868566904196) internal successors, (14288), 5052 states have internal predecessors, (14288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14288 transitions. [2021-05-21 15:54:33,105 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14288 transitions. Word has length 155 [2021-05-21 15:54:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:33,105 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14288 transitions. [2021-05-21 15:54:33,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14288 transitions. [2021-05-21 15:54:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:33,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:33,109 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:33,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:33,309 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1229775590, now seen corresponding path program 318 times [2021-05-21 15:54:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:33,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458168301] [2021-05-21 15:54:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:33,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:33,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458168301] [2021-05-21 15:54:33,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458168301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:33,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174691145] [2021-05-21 15:54:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:33,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-21 15:54:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:33,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:33,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174691145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:33,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:33,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-05-21 15:54:33,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640174892] [2021-05-21 15:54:33,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 15:54:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 15:54:33,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:54:33,720 INFO L87 Difference]: Start difference. First operand 5053 states and 14288 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:34,574 INFO L93 Difference]: Finished difference Result 6948 states and 18871 transitions. [2021-05-21 15:54:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:54:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:34,579 INFO L225 Difference]: With dead ends: 6948 [2021-05-21 15:54:34,579 INFO L226 Difference]: Without dead ends: 6678 [2021-05-21 15:54:34,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 821.2ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:54:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-05-21 15:54:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 5233. [2021-05-21 15:54:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.8377293577981653) internal successors, (14847), 5232 states have internal predecessors, (14847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 14847 transitions. [2021-05-21 15:54:34,632 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 14847 transitions. Word has length 155 [2021-05-21 15:54:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:34,633 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 14847 transitions. [2021-05-21 15:54:34,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 14847 transitions. [2021-05-21 15:54:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-21 15:54:34,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:34,636 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:34,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-05-21 15:54:34,837 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1207432340, now seen corresponding path program 319 times [2021-05-21 15:54:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:34,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816172660] [2021-05-21 15:54:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:35,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:35,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816172660] [2021-05-21 15:54:35,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816172660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:35,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516826483] [2021-05-21 15:54:35,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:54:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516826483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-05-21 15:54:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503859657] [2021-05-21 15:54:35,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:35,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:35,253 INFO L87 Difference]: Start difference. First operand 5233 states and 14847 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:36,262 INFO L93 Difference]: Finished difference Result 6410 states and 17521 transitions. [2021-05-21 15:54:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:54:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-05-21 15:54:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:36,268 INFO L225 Difference]: With dead ends: 6410 [2021-05-21 15:54:36,269 INFO L226 Difference]: Without dead ends: 5921 [2021-05-21 15:54:36,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 986.1ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:54:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-05-21 15:54:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5178. [2021-05-21 15:54:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.836198570600734) internal successors, (14683), 5177 states have internal predecessors, (14683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 14683 transitions. [2021-05-21 15:54:36,319 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 14683 transitions. Word has length 155 [2021-05-21 15:54:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:36,319 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 14683 transitions. [2021-05-21 15:54:36,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 14683 transitions. [2021-05-21 15:54:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:36,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:36,323 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:36,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:36,523 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -998997856, now seen corresponding path program 320 times [2021-05-21 15:54:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:36,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344832064] [2021-05-21 15:54:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:36,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:36,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344832064] [2021-05-21 15:54:36,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344832064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:36,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214757597] [2021-05-21 15:54:36,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:36,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:36,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:54:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:37,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214757597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:37,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:37,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-05-21 15:54:37,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673689206] [2021-05-21 15:54:37,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:54:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:37,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:54:37,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:54:37,101 INFO L87 Difference]: Start difference. First operand 5178 states and 14683 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:37,662 INFO L93 Difference]: Finished difference Result 6468 states and 17583 transitions. [2021-05-21 15:54:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:54:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:37,669 INFO L225 Difference]: With dead ends: 6468 [2021-05-21 15:54:37,669 INFO L226 Difference]: Without dead ends: 6134 [2021-05-21 15:54:37,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:54:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-05-21 15:54:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 5263. [2021-05-21 15:54:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.822690992018244) internal successors, (14853), 5262 states have internal predecessors, (14853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 14853 transitions. [2021-05-21 15:54:37,718 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 14853 transitions. Word has length 160 [2021-05-21 15:54:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:37,718 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 14853 transitions. [2021-05-21 15:54:37,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 14853 transitions. [2021-05-21 15:54:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:37,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:37,722 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:37,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-05-21 15:54:37,923 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 595396196, now seen corresponding path program 321 times [2021-05-21 15:54:37,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:37,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443279077] [2021-05-21 15:54:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:38,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443279077] [2021-05-21 15:54:38,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443279077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204139193] [2021-05-21 15:54:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:38,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:54:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:38,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:38,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204139193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:38,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:38,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673694032] [2021-05-21 15:54:38,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:38,445 INFO L87 Difference]: Start difference. First operand 5263 states and 14853 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:38,908 INFO L93 Difference]: Finished difference Result 7561 states and 19577 transitions. [2021-05-21 15:54:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:54:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:38,915 INFO L225 Difference]: With dead ends: 7561 [2021-05-21 15:54:38,915 INFO L226 Difference]: Without dead ends: 7291 [2021-05-21 15:54:38,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:54:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-05-21 15:54:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 5278. [2021-05-21 15:54:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:38,964 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:38,965 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:38,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:38,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:38,968 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:39,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:39,169 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash 94082356, now seen corresponding path program 322 times [2021-05-21 15:54:39,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:39,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111457164] [2021-05-21 15:54:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:39,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:39,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111457164] [2021-05-21 15:54:39,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111457164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:39,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915584870] [2021-05-21 15:54:39,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:39,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:39,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915584870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:39,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:39,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274038650] [2021-05-21 15:54:39,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:39,681 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:40,227 INFO L93 Difference]: Finished difference Result 7446 states and 19347 transitions. [2021-05-21 15:54:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:54:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:40,234 INFO L225 Difference]: With dead ends: 7446 [2021-05-21 15:54:40,234 INFO L226 Difference]: Without dead ends: 7176 [2021-05-21 15:54:40,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:54:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-05-21 15:54:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5278. [2021-05-21 15:54:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:40,281 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:40,281 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:40,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:40,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:40,285 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-05-21 15:54:40,485 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 570577698, now seen corresponding path program 323 times [2021-05-21 15:54:40,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:40,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628648646] [2021-05-21 15:54:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:40,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:40,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628648646] [2021-05-21 15:54:40,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628648646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:40,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781762809] [2021-05-21 15:54:40,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:40,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:54:40,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:40,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781762809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:40,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:40,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60760306] [2021-05-21 15:54:40,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:40,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:40,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:40,959 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:41,448 INFO L93 Difference]: Finished difference Result 7421 states and 19297 transitions. [2021-05-21 15:54:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:54:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:41,456 INFO L225 Difference]: With dead ends: 7421 [2021-05-21 15:54:41,456 INFO L226 Difference]: Without dead ends: 7151 [2021-05-21 15:54:41,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:54:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-05-21 15:54:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5278. [2021-05-21 15:54:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:41,508 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:41,509 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:41,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:41,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:41,512 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:41,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-05-21 15:54:41,713 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2037261810, now seen corresponding path program 324 times [2021-05-21 15:54:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:41,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566084142] [2021-05-21 15:54:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:41,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:41,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566084142] [2021-05-21 15:54:41,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566084142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:41,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112718388] [2021-05-21 15:54:41,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:42,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:54:42,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:42,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112718388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:42,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:42,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:42,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983712523] [2021-05-21 15:54:42,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:42,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:42,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:42,239 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:42,827 INFO L93 Difference]: Finished difference Result 7371 states and 19197 transitions. [2021-05-21 15:54:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:54:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:42,835 INFO L225 Difference]: With dead ends: 7371 [2021-05-21 15:54:42,835 INFO L226 Difference]: Without dead ends: 7101 [2021-05-21 15:54:42,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:54:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-05-21 15:54:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5278. [2021-05-21 15:54:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:42,885 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:42,885 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:42,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:42,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:42,889 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:43,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:43,089 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1902040416, now seen corresponding path program 325 times [2021-05-21 15:54:43,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:43,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562388639] [2021-05-21 15:54:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:43,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:43,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562388639] [2021-05-21 15:54:43,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562388639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:43,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953145642] [2021-05-21 15:54:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:43,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953145642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:43,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:43,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578547091] [2021-05-21 15:54:43,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:43,565 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:44,127 INFO L93 Difference]: Finished difference Result 7321 states and 19097 transitions. [2021-05-21 15:54:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:54:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:44,133 INFO L225 Difference]: With dead ends: 7321 [2021-05-21 15:54:44,133 INFO L226 Difference]: Without dead ends: 7051 [2021-05-21 15:54:44,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:54:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-05-21 15:54:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5278. [2021-05-21 15:54:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:44,183 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:44,184 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:44,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:44,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:44,188 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-21 15:54:44,388 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:44,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1025305648, now seen corresponding path program 326 times [2021-05-21 15:54:44,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:44,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645034036] [2021-05-21 15:54:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:44,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:44,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645034036] [2021-05-21 15:54:44,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645034036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:44,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283708659] [2021-05-21 15:54:44,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:44,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:44,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283708659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:44,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:44,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:44,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910077222] [2021-05-21 15:54:44,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:44,894 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:45,555 INFO L93 Difference]: Finished difference Result 7271 states and 18997 transitions. [2021-05-21 15:54:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:54:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:45,563 INFO L225 Difference]: With dead ends: 7271 [2021-05-21 15:54:45,563 INFO L226 Difference]: Without dead ends: 7001 [2021-05-21 15:54:45,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:54:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-05-21 15:54:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5278. [2021-05-21 15:54:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:45,615 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:45,616 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:45,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:45,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:45,619 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:45,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-05-21 15:54:45,820 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash -712020706, now seen corresponding path program 327 times [2021-05-21 15:54:45,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:45,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182221602] [2021-05-21 15:54:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:46,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182221602] [2021-05-21 15:54:46,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182221602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376230277] [2021-05-21 15:54:46,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:46,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:54:46,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:46,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376230277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:46,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:46,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:46,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034293992] [2021-05-21 15:54:46,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:46,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:46,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:46,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:46,319 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:46,919 INFO L93 Difference]: Finished difference Result 7221 states and 18897 transitions. [2021-05-21 15:54:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:54:46,919 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:46,926 INFO L225 Difference]: With dead ends: 7221 [2021-05-21 15:54:46,926 INFO L226 Difference]: Without dead ends: 6951 [2021-05-21 15:54:46,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:54:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-05-21 15:54:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5278. [2021-05-21 15:54:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:46,977 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:46,978 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:46,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:46,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:46,981 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:47,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-05-21 15:54:47,182 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash 652527598, now seen corresponding path program 328 times [2021-05-21 15:54:47,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:47,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958370385] [2021-05-21 15:54:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:47,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:47,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958370385] [2021-05-21 15:54:47,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958370385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:47,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352137564] [2021-05-21 15:54:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:47,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:47,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352137564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:47,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:47,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:47,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012674034] [2021-05-21 15:54:47,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:47,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:47,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:47,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:47,682 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:48,387 INFO L93 Difference]: Finished difference Result 7171 states and 18797 transitions. [2021-05-21 15:54:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:54:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:48,395 INFO L225 Difference]: With dead ends: 7171 [2021-05-21 15:54:48,395 INFO L226 Difference]: Without dead ends: 6901 [2021-05-21 15:54:48,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 744.5ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:54:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-05-21 15:54:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5278. [2021-05-21 15:54:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:48,448 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:48,448 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:48,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:48,452 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:48,452 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:48,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-05-21 15:54:48,659 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:48,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1624704420, now seen corresponding path program 329 times [2021-05-21 15:54:48,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:48,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263481249] [2021-05-21 15:54:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:48,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263481249] [2021-05-21 15:54:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263481249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626244722] [2021-05-21 15:54:48,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:48,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:54:48,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626244722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:49,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:49,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:49,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143006654] [2021-05-21 15:54:49,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:49,110 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:49,791 INFO L93 Difference]: Finished difference Result 7121 states and 18697 transitions. [2021-05-21 15:54:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:54:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:49,798 INFO L225 Difference]: With dead ends: 7121 [2021-05-21 15:54:49,798 INFO L226 Difference]: Without dead ends: 6851 [2021-05-21 15:54:49,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:54:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-05-21 15:54:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5278. [2021-05-21 15:54:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:49,859 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:49,860 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:49,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:49,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:49,863 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:50,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-05-21 15:54:50,064 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1771739436, now seen corresponding path program 330 times [2021-05-21 15:54:50,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:50,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456483498] [2021-05-21 15:54:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:50,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:50,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456483498] [2021-05-21 15:54:50,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456483498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:50,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490346513] [2021-05-21 15:54:50,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:50,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:54:50,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:50,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:50,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490346513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:50,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:50,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:50,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608912449] [2021-05-21 15:54:50,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:50,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:50,572 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:51,324 INFO L93 Difference]: Finished difference Result 7071 states and 18597 transitions. [2021-05-21 15:54:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:54:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:51,331 INFO L225 Difference]: With dead ends: 7071 [2021-05-21 15:54:51,331 INFO L226 Difference]: Without dead ends: 6801 [2021-05-21 15:54:51,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:54:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-05-21 15:54:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-05-21 15:54:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:51,383 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:51,383 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:51,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:51,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:51,387 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:51,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:51,588 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash 156785946, now seen corresponding path program 331 times [2021-05-21 15:54:51,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:51,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185796836] [2021-05-21 15:54:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:51,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:51,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185796836] [2021-05-21 15:54:51,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185796836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:51,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537788965] [2021-05-21 15:54:51,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:51,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:52,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537788965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:52,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:52,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:52,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920309033] [2021-05-21 15:54:52,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:52,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:52,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:52,067 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:52,724 INFO L93 Difference]: Finished difference Result 7021 states and 18497 transitions. [2021-05-21 15:54:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:54:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:52,731 INFO L225 Difference]: With dead ends: 7021 [2021-05-21 15:54:52,731 INFO L226 Difference]: Without dead ends: 6751 [2021-05-21 15:54:52,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 687.6ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:54:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-05-21 15:54:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5278. [2021-05-21 15:54:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:52,781 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:52,781 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:52,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:52,785 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:52,785 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:52,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:52,985 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -223658006, now seen corresponding path program 332 times [2021-05-21 15:54:52,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:52,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582314637] [2021-05-21 15:54:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:53,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:53,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582314637] [2021-05-21 15:54:53,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582314637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:53,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050167567] [2021-05-21 15:54:53,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:53,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:54:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050167567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:53,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:53,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168295584] [2021-05-21 15:54:53,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:53,446 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:54,293 INFO L93 Difference]: Finished difference Result 6971 states and 18397 transitions. [2021-05-21 15:54:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:54:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:54,299 INFO L225 Difference]: With dead ends: 6971 [2021-05-21 15:54:54,299 INFO L226 Difference]: Without dead ends: 6701 [2021-05-21 15:54:54,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 838.3ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:54:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-05-21 15:54:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 5278. [2021-05-21 15:54:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:54,348 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:54,348 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:54,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:54,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:54,352 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:54,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:54,552 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:54,553 INFO L82 PathProgramCache]: Analyzing trace with hash 400717144, now seen corresponding path program 333 times [2021-05-21 15:54:54,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:54,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80751091] [2021-05-21 15:54:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:54,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80751091] [2021-05-21 15:54:54,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80751091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497085468] [2021-05-21 15:54:54,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:54,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:54:54,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:55,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497085468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:55,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:55,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988064714] [2021-05-21 15:54:55,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:55,014 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:55,721 INFO L93 Difference]: Finished difference Result 6921 states and 18297 transitions. [2021-05-21 15:54:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:54:55,721 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:55,728 INFO L225 Difference]: With dead ends: 6921 [2021-05-21 15:54:55,728 INFO L226 Difference]: Without dead ends: 6651 [2021-05-21 15:54:55,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:54:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-05-21 15:54:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 5278. [2021-05-21 15:54:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:55,782 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:55,782 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:55,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:55,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:55,786 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:55,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:55,987 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:55,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1209769000, now seen corresponding path program 334 times [2021-05-21 15:54:55,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:55,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687063095] [2021-05-21 15:54:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:56,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687063095] [2021-05-21 15:54:56,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687063095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:56,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393027779] [2021-05-21 15:54:56,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:56,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:54:56,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:56,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393027779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:56,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:56,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:56,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198940060] [2021-05-21 15:54:56,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:56,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:56,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:56,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:56,506 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:57,379 INFO L93 Difference]: Finished difference Result 6871 states and 18197 transitions. [2021-05-21 15:54:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:54:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:57,386 INFO L225 Difference]: With dead ends: 6871 [2021-05-21 15:54:57,387 INFO L226 Difference]: Without dead ends: 6601 [2021-05-21 15:54:57,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 871.6ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:54:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-05-21 15:54:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 5278. [2021-05-21 15:54:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:57,443 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:57,443 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:57,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:57,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:57,447 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:57,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-05-21 15:54:57,648 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:57,648 INFO L82 PathProgramCache]: Analyzing trace with hash -182181098, now seen corresponding path program 335 times [2021-05-21 15:54:57,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:57,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69715283] [2021-05-21 15:54:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:57,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:57,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69715283] [2021-05-21 15:54:57,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69715283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:57,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974197036] [2021-05-21 15:54:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:57,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:54:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:57,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:58,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974197036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:58,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:58,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:54:58,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740848300] [2021-05-21 15:54:58,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:54:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:54:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:54:58,081 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:54:58,835 INFO L93 Difference]: Finished difference Result 6821 states and 18097 transitions. [2021-05-21 15:54:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:54:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:54:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:54:58,841 INFO L225 Difference]: With dead ends: 6821 [2021-05-21 15:54:58,841 INFO L226 Difference]: Without dead ends: 6551 [2021-05-21 15:54:58,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:54:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-05-21 15:54:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 5278. [2021-05-21 15:54:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:54:58,886 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:54:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:54:58,886 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:54:58,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:54:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:54:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:54:58,890 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:54:58,890 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:54:59,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-05-21 15:54:59,090 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:54:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:54:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash -427258394, now seen corresponding path program 336 times [2021-05-21 15:54:59,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:54:59,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886223862] [2021-05-21 15:54:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:54:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:54:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:59,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:54:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886223862] [2021-05-21 15:54:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886223862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83350209] [2021-05-21 15:54:59,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:54:59,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:54:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:54:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:54:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:54:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:54:59,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83350209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:54:59,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:54:59,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:54:59,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560461464] [2021-05-21 15:54:59,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:54:59,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:54:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:54:59,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:54:59,571 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:00,447 INFO L93 Difference]: Finished difference Result 6771 states and 17997 transitions. [2021-05-21 15:55:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:55:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:00,453 INFO L225 Difference]: With dead ends: 6771 [2021-05-21 15:55:00,453 INFO L226 Difference]: Without dead ends: 6501 [2021-05-21 15:55:00,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 879.9ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:55:00,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-05-21 15:55:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 5278. [2021-05-21 15:55:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:00,506 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:00,506 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:00,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:00,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:00,510 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:00,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-05-21 15:55:00,710 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash -804108716, now seen corresponding path program 337 times [2021-05-21 15:55:00,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:00,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995702258] [2021-05-21 15:55:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:00,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:00,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995702258] [2021-05-21 15:55:00,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995702258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:00,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003260251] [2021-05-21 15:55:00,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:01,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003260251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:01,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:01,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:55:01,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192603542] [2021-05-21 15:55:01,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:55:01,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:01,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:55:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:55:01,154 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:01,918 INFO L93 Difference]: Finished difference Result 6721 states and 17897 transitions. [2021-05-21 15:55:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:55:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:01,924 INFO L225 Difference]: With dead ends: 6721 [2021-05-21 15:55:01,924 INFO L226 Difference]: Without dead ends: 6451 [2021-05-21 15:55:01,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:55:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-05-21 15:55:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5278. [2021-05-21 15:55:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:01,973 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:01,973 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:01,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:01,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:01,977 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:02,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-21 15:55:02,178 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash 522646820, now seen corresponding path program 338 times [2021-05-21 15:55:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:02,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834260022] [2021-05-21 15:55:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:02,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:02,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834260022] [2021-05-21 15:55:02,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834260022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:02,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874243083] [2021-05-21 15:55:02,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:02,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:55:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:02,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874243083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:02,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:02,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:55:02,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936591454] [2021-05-21 15:55:02,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:02,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:02,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:02,768 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:03,824 INFO L93 Difference]: Finished difference Result 6671 states and 17797 transitions. [2021-05-21 15:55:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:55:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:03,831 INFO L225 Difference]: With dead ends: 6671 [2021-05-21 15:55:03,831 INFO L226 Difference]: Without dead ends: 6401 [2021-05-21 15:55:03,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1094.1ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:55:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-05-21 15:55:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 5278. [2021-05-21 15:55:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:03,884 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:03,884 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:03,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:03,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:03,888 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:04,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:04,089 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash 976862994, now seen corresponding path program 339 times [2021-05-21 15:55:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489749698] [2021-05-21 15:55:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:04,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489749698] [2021-05-21 15:55:04,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489749698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710311304] [2021-05-21 15:55:04,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:04,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:55:04,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:04,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710311304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:04,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:04,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:55:04,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43003535] [2021-05-21 15:55:04,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:55:04,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:04,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:55:04,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:55:04,536 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:05,393 INFO L93 Difference]: Finished difference Result 6621 states and 17697 transitions. [2021-05-21 15:55:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:55:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:05,400 INFO L225 Difference]: With dead ends: 6621 [2021-05-21 15:55:05,400 INFO L226 Difference]: Without dead ends: 6351 [2021-05-21 15:55:05,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:55:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-05-21 15:55:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 5278. [2021-05-21 15:55:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:05,453 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:05,454 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:05,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:05,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:05,457 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:05,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-05-21 15:55:05,658 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1975759330, now seen corresponding path program 340 times [2021-05-21 15:55:05,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:05,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416490949] [2021-05-21 15:55:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:05,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:05,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416490949] [2021-05-21 15:55:05,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416490949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:05,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673707819] [2021-05-21 15:55:05,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:05,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:55:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:06,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673707819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:06,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:06,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:55:06,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218280723] [2021-05-21 15:55:06,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:06,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:06,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:06,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:06,151 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:07,333 INFO L93 Difference]: Finished difference Result 6571 states and 17597 transitions. [2021-05-21 15:55:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:55:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:07,340 INFO L225 Difference]: With dead ends: 6571 [2021-05-21 15:55:07,341 INFO L226 Difference]: Without dead ends: 6301 [2021-05-21 15:55:07,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1065.6ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:55:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-05-21 15:55:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 5278. [2021-05-21 15:55:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:07,400 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:07,400 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:07,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:07,405 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:07,405 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:07,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:07,620 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash 96431440, now seen corresponding path program 341 times [2021-05-21 15:55:07,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:07,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213784118] [2021-05-21 15:55:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:07,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213784118] [2021-05-21 15:55:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213784118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352780938] [2021-05-21 15:55:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:07,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:55:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:08,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352780938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:08,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:08,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:55:08,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783848514] [2021-05-21 15:55:08,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:55:08,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:55:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:55:08,102 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:09,083 INFO L93 Difference]: Finished difference Result 6521 states and 17497 transitions. [2021-05-21 15:55:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:55:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:09,089 INFO L225 Difference]: With dead ends: 6521 [2021-05-21 15:55:09,089 INFO L226 Difference]: Without dead ends: 6251 [2021-05-21 15:55:09,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:55:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-05-21 15:55:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 5278. [2021-05-21 15:55:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:09,137 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:09,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:09,137 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:09,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:09,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:09,141 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:09,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-05-21 15:55:09,342 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2126750752, now seen corresponding path program 342 times [2021-05-21 15:55:09,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:09,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317692861] [2021-05-21 15:55:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:09,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:09,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317692861] [2021-05-21 15:55:09,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317692861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:09,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657222216] [2021-05-21 15:55:09,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:09,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:55:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:09,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657222216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:09,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:09,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:55:09,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511052150] [2021-05-21 15:55:09,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:09,805 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:10,931 INFO L93 Difference]: Finished difference Result 6471 states and 17397 transitions. [2021-05-21 15:55:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:55:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:10,938 INFO L225 Difference]: With dead ends: 6471 [2021-05-21 15:55:10,938 INFO L226 Difference]: Without dead ends: 6201 [2021-05-21 15:55:10,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1047.5ms TimeCoverageRelationStatistics Valid=1857, Invalid=5115, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 15:55:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-05-21 15:55:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5278. [2021-05-21 15:55:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:11,003 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:11,003 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:11,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:11,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:11,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:11,007 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:11,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:11,207 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:11,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1553977074, now seen corresponding path program 343 times [2021-05-21 15:55:11,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:11,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383221973] [2021-05-21 15:55:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:11,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383221973] [2021-05-21 15:55:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383221973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215591715] [2021-05-21 15:55:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:11,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:11,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215591715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:11,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:11,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:55:11,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912591162] [2021-05-21 15:55:11,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:55:11,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:11,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:55:11,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:55:11,632 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:12,563 INFO L93 Difference]: Finished difference Result 6421 states and 17297 transitions. [2021-05-21 15:55:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:55:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:12,570 INFO L225 Difference]: With dead ends: 6421 [2021-05-21 15:55:12,570 INFO L226 Difference]: Without dead ends: 6151 [2021-05-21 15:55:12,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:55:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-05-21 15:55:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5278. [2021-05-21 15:55:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-05-21 15:55:12,625 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-05-21 15:55:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:12,625 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-05-21 15:55:12,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-05-21 15:55:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:12,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:12,629 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:12,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:12,829 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1025747934, now seen corresponding path program 344 times [2021-05-21 15:55:12,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:12,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455149514] [2021-05-21 15:55:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:13,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455149514] [2021-05-21 15:55:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455149514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110427895] [2021-05-21 15:55:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:13,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:55:13,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:13,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110427895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:13,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:13,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:55:13,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201465724] [2021-05-21 15:55:13,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:13,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:13,323 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:14,586 INFO L93 Difference]: Finished difference Result 6879 states and 18563 transitions. [2021-05-21 15:55:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 15:55:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:14,594 INFO L225 Difference]: With dead ends: 6879 [2021-05-21 15:55:14,594 INFO L226 Difference]: Without dead ends: 6256 [2021-05-21 15:55:14,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 1156.7ms TimeCoverageRelationStatistics Valid=2045, Invalid=5611, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 15:55:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-05-21 15:55:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5188. [2021-05-21 15:55:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5187 states have (on average 2.82398303450935) internal successors, (14648), 5187 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-05-21 15:55:14,661 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-05-21 15:55:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:14,661 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-05-21 15:55:14,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-05-21 15:55:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:14,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:14,665 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:14,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:14,866 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash -6899668, now seen corresponding path program 345 times [2021-05-21 15:55:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:14,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684394400] [2021-05-21 15:55:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:15,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:15,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684394400] [2021-05-21 15:55:15,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684394400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:15,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587357765] [2021-05-21 15:55:15,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:15,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:55:15,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:15,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:15,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:15,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587357765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:15,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:15,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-05-21 15:55:15,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632009450] [2021-05-21 15:55:15,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 15:55:15,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:15,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 15:55:15,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:55:15,316 INFO L87 Difference]: Start difference. First operand 5188 states and 14648 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:16,283 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-05-21 15:55:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:55:16,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:16,289 INFO L225 Difference]: With dead ends: 7108 [2021-05-21 15:55:16,289 INFO L226 Difference]: Without dead ends: 6838 [2021-05-21 15:55:16,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 15:55:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-05-21 15:55:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-05-21 15:55:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.8334264952487422) internal successors, (15207), 5367 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-05-21 15:55:16,349 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-05-21 15:55:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:16,349 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-05-21 15:55:16,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-05-21 15:55:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-21 15:55:16,353 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:16,353 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:16,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-05-21 15:55:16,554 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:16,554 INFO L82 PathProgramCache]: Analyzing trace with hash 15443582, now seen corresponding path program 346 times [2021-05-21 15:55:16,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:16,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422988424] [2021-05-21 15:55:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:16,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:16,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422988424] [2021-05-21 15:55:16,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422988424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:16,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687749264] [2021-05-21 15:55:16,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:16,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:55:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:55:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:17,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687749264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:17,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:17,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-05-21 15:55:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236154134] [2021-05-21 15:55:17,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:17,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:17,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:17,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:17,050 INFO L87 Difference]: Start difference. First operand 5368 states and 15207 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:18,471 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-05-21 15:55:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:55:18,472 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-05-21 15:55:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:18,476 INFO L225 Difference]: With dead ends: 6595 [2021-05-21 15:55:18,476 INFO L226 Difference]: Without dead ends: 6106 [2021-05-21 15:55:18,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1308.5ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 15:55:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-05-21 15:55:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-05-21 15:55:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7414578587699316) internal successors, (9628), 3512 states have internal predecessors, (9628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-05-21 15:55:18,516 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-05-21 15:55:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:18,516 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-05-21 15:55:18,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-05-21 15:55:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:18,519 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:18,519 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:18,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-05-21 15:55:18,720 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash 278983457, now seen corresponding path program 347 times [2021-05-21 15:55:18,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:18,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783622368] [2021-05-21 15:55:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:19,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:19,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783622368] [2021-05-21 15:55:19,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783622368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:19,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494958184] [2021-05-21 15:55:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:19,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:55:19,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:19,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:19,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:19,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494958184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:19,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:19,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:19,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182518405] [2021-05-21 15:55:19,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:19,229 INFO L87 Difference]: Start difference. First operand 3513 states and 9628 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:19,790 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-05-21 15:55:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:55:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:19,795 INFO L225 Difference]: With dead ends: 5231 [2021-05-21 15:55:19,795 INFO L226 Difference]: Without dead ends: 4961 [2021-05-21 15:55:19,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 631.3ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:55:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-05-21 15:55:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-05-21 15:55:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.7468636743797044) internal successors, (9853), 3587 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-05-21 15:55:19,828 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-05-21 15:55:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:19,829 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-05-21 15:55:19,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-05-21 15:55:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:19,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:19,831 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:20,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-05-21 15:55:20,032 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash -222330383, now seen corresponding path program 348 times [2021-05-21 15:55:20,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:20,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729861449] [2021-05-21 15:55:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:20,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729861449] [2021-05-21 15:55:20,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729861449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222958163] [2021-05-21 15:55:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:20,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:55:20,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:20,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222958163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:20,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:20,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:20,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627926846] [2021-05-21 15:55:20,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:20,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:20,593 INFO L87 Difference]: Start difference. First operand 3588 states and 9853 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:21,186 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-05-21 15:55:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:55:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:21,191 INFO L225 Difference]: With dead ends: 5901 [2021-05-21 15:55:21,191 INFO L226 Difference]: Without dead ends: 5631 [2021-05-21 15:55:21,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:55:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-05-21 15:55:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-05-21 15:55:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.75204806116876) internal successors, (10078), 3662 states have internal predecessors, (10078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-05-21 15:55:21,228 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-05-21 15:55:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:21,228 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-05-21 15:55:21,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-05-21 15:55:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:21,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:21,231 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:21,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:21,431 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 254164959, now seen corresponding path program 349 times [2021-05-21 15:55:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:21,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644300224] [2021-05-21 15:55:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:21,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:21,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644300224] [2021-05-21 15:55:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644300224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:21,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908694620] [2021-05-21 15:55:21,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:21,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908694620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:21,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:21,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:21,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683001518] [2021-05-21 15:55:21,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:21,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:21,959 INFO L87 Difference]: Start difference. First operand 3663 states and 10078 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:22,502 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-05-21 15:55:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:55:22,502 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:22,507 INFO L225 Difference]: With dead ends: 5931 [2021-05-21 15:55:22,508 INFO L226 Difference]: Without dead ends: 5661 [2021-05-21 15:55:22,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 664.7ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:55:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-05-21 15:55:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-05-21 15:55:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.757024351083757) internal successors, (10303), 3737 states have internal predecessors, (10303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-05-21 15:55:22,547 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-05-21 15:55:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:22,548 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-05-21 15:55:22,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-05-21 15:55:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:22,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:22,550 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:22,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-05-21 15:55:22,751 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1720849071, now seen corresponding path program 350 times [2021-05-21 15:55:22,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:22,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554573899] [2021-05-21 15:55:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:23,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:23,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554573899] [2021-05-21 15:55:23,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554573899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:23,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356225502] [2021-05-21 15:55:23,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:23,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:55:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356225502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:23,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:23,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:23,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515156125] [2021-05-21 15:55:23,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:23,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:23,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:23,336 INFO L87 Difference]: Start difference. First operand 3738 states and 10303 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:24,070 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-05-21 15:55:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:55:24,071 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:24,076 INFO L225 Difference]: With dead ends: 5956 [2021-05-21 15:55:24,077 INFO L226 Difference]: Without dead ends: 5686 [2021-05-21 15:55:24,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 817.9ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:55:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-05-21 15:55:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-05-21 15:55:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.7618048268625395) internal successors, (10528), 3812 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-05-21 15:55:24,125 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-05-21 15:55:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:24,125 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-05-21 15:55:24,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-05-21 15:55:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:24,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:24,128 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:24,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:24,329 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1585627677, now seen corresponding path program 351 times [2021-05-21 15:55:24,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:24,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186544886] [2021-05-21 15:55:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:24,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:24,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186544886] [2021-05-21 15:55:24,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186544886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526339571] [2021-05-21 15:55:24,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:24,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:55:24,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:24,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526339571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:24,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:24,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357347385] [2021-05-21 15:55:24,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:24,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:24,919 INFO L87 Difference]: Start difference. First operand 3813 states and 10528 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:25,527 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-05-21 15:55:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:55:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:25,532 INFO L225 Difference]: With dead ends: 5981 [2021-05-21 15:55:25,533 INFO L226 Difference]: Without dead ends: 5711 [2021-05-21 15:55:25,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 739.0ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 15:55:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-05-21 15:55:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-05-21 15:55:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7664008232570105) internal successors, (10753), 3887 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-05-21 15:55:25,593 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-05-21 15:55:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:25,593 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-05-21 15:55:25,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-05-21 15:55:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:25,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:25,596 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:25,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-05-21 15:55:25,797 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 708892909, now seen corresponding path program 352 times [2021-05-21 15:55:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:25,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727532400] [2021-05-21 15:55:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:26,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:26,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727532400] [2021-05-21 15:55:26,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727532400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:26,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347846023] [2021-05-21 15:55:26,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:26,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:55:26,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:26,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347846023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:26,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:26,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:26,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023168097] [2021-05-21 15:55:26,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:26,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:26,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:26,401 INFO L87 Difference]: Start difference. First operand 3888 states and 10753 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:27,121 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-05-21 15:55:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:55:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:27,127 INFO L225 Difference]: With dead ends: 6006 [2021-05-21 15:55:27,127 INFO L226 Difference]: Without dead ends: 5736 [2021-05-21 15:55:27,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:55:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-05-21 15:55:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-05-21 15:55:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7708228167592126) internal successors, (10978), 3962 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-05-21 15:55:27,169 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-05-21 15:55:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:27,169 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-05-21 15:55:27,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-05-21 15:55:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:27,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:27,172 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:27,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:27,373 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1028433445, now seen corresponding path program 353 times [2021-05-21 15:55:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:27,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519865196] [2021-05-21 15:55:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519865196] [2021-05-21 15:55:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519865196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534991248] [2021-05-21 15:55:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:27,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:55:27,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:27,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534991248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:27,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:27,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:27,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601788290] [2021-05-21 15:55:27,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:27,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:27,870 INFO L87 Difference]: Start difference. First operand 3963 states and 10978 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:28,530 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-05-21 15:55:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:55:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:28,536 INFO L225 Difference]: With dead ends: 6031 [2021-05-21 15:55:28,536 INFO L226 Difference]: Without dead ends: 5761 [2021-05-21 15:55:28,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 695.2ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:55:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-05-21 15:55:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-05-21 15:55:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.775080505325737) internal successors, (11203), 4037 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-05-21 15:55:28,582 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-05-21 15:55:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:28,582 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-05-21 15:55:28,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-05-21 15:55:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:28,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:28,585 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:28,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:28,786 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash 336114859, now seen corresponding path program 354 times [2021-05-21 15:55:28,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:28,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752319917] [2021-05-21 15:55:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:29,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:29,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752319917] [2021-05-21 15:55:29,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752319917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:29,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365259744] [2021-05-21 15:55:29,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:29,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:55:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:29,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365259744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:29,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:29,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:29,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314115991] [2021-05-21 15:55:29,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:29,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:29,320 INFO L87 Difference]: Start difference. First operand 4038 states and 11203 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:30,084 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-05-21 15:55:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:55:30,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:30,090 INFO L225 Difference]: With dead ends: 6056 [2021-05-21 15:55:30,090 INFO L226 Difference]: Without dead ends: 5786 [2021-05-21 15:55:30,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:55:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-05-21 15:55:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-05-21 15:55:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.779182879377432) internal successors, (11428), 4112 states have internal predecessors, (11428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-05-21 15:55:30,134 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-05-21 15:55:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:30,134 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-05-21 15:55:30,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-05-21 15:55:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:30,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:30,137 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:30,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:30,338 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1941117159, now seen corresponding path program 355 times [2021-05-21 15:55:30,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:30,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788722428] [2021-05-21 15:55:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:30,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:30,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788722428] [2021-05-21 15:55:30,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788722428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:30,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038660128] [2021-05-21 15:55:30,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:30,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:30,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:30,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038660128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:30,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:30,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:30,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351068895] [2021-05-21 15:55:30,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:30,831 INFO L87 Difference]: Start difference. First operand 4113 states and 11428 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:31,509 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-05-21 15:55:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:55:31,509 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:31,514 INFO L225 Difference]: With dead ends: 6081 [2021-05-21 15:55:31,515 INFO L226 Difference]: Without dead ends: 5811 [2021-05-21 15:55:31,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 737.4ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:55:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-05-21 15:55:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-05-21 15:55:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7831382851683784) internal successors, (11653), 4187 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-05-21 15:55:31,558 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-05-21 15:55:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:31,558 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-05-21 15:55:31,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-05-21 15:55:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:31,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:31,561 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:31,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-05-21 15:55:31,762 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:31,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1455326697, now seen corresponding path program 356 times [2021-05-21 15:55:31,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:31,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842591834] [2021-05-21 15:55:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:32,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:32,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842591834] [2021-05-21 15:55:32,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842591834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:32,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84251399] [2021-05-21 15:55:32,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:32,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:55:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:32,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:32,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:32,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84251399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:32,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:32,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:32,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673580628] [2021-05-21 15:55:32,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:32,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:32,257 INFO L87 Difference]: Start difference. First operand 4188 states and 11653 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:33,072 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-05-21 15:55:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:55:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:33,078 INFO L225 Difference]: With dead ends: 6106 [2021-05-21 15:55:33,078 INFO L226 Difference]: Without dead ends: 5836 [2021-05-21 15:55:33,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:55:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-05-21 15:55:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-05-21 15:55:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.786954481464101) internal successors, (11878), 4262 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-05-21 15:55:33,119 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-05-21 15:55:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:33,119 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-05-21 15:55:33,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-05-21 15:55:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:33,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:33,122 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:33,323 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash -159626793, now seen corresponding path program 357 times [2021-05-21 15:55:33,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:33,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266762533] [2021-05-21 15:55:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:33,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:33,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266762533] [2021-05-21 15:55:33,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266762533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689434782] [2021-05-21 15:55:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:33,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:55:33,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:33,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689434782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:33,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:33,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:33,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385091708] [2021-05-21 15:55:33,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:33,822 INFO L87 Difference]: Start difference. First operand 4263 states and 11878 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:34,518 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-05-21 15:55:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:55:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:34,525 INFO L225 Difference]: With dead ends: 6131 [2021-05-21 15:55:34,525 INFO L226 Difference]: Without dead ends: 5861 [2021-05-21 15:55:34,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:55:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-05-21 15:55:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-05-21 15:55:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.790638690338944) internal successors, (12103), 4337 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-05-21 15:55:34,578 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-05-21 15:55:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:34,578 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-05-21 15:55:34,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-05-21 15:55:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:34,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:34,582 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:34,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-05-21 15:55:34,782 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash -540070745, now seen corresponding path program 358 times [2021-05-21 15:55:34,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:34,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145514537] [2021-05-21 15:55:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:35,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:35,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145514537] [2021-05-21 15:55:35,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145514537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:35,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053748787] [2021-05-21 15:55:35,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:35,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:55:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:35,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:35,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053748787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:35,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:35,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:35,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556593616] [2021-05-21 15:55:35,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:35,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:35,288 INFO L87 Difference]: Start difference. First operand 4338 states and 12103 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:36,163 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-05-21 15:55:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:55:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:36,169 INFO L225 Difference]: With dead ends: 6156 [2021-05-21 15:55:36,169 INFO L226 Difference]: Without dead ends: 5886 [2021-05-21 15:55:36,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 893.4ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:55:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-05-21 15:55:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-05-21 15:55:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.7941976427923843) internal successors, (12328), 4412 states have internal predecessors, (12328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-05-21 15:55:36,216 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-05-21 15:55:36,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:36,216 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-05-21 15:55:36,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:36,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-05-21 15:55:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:36,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:36,219 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:36,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-21 15:55:36,420 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 84304405, now seen corresponding path program 359 times [2021-05-21 15:55:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:36,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972451682] [2021-05-21 15:55:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:36,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972451682] [2021-05-21 15:55:36,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972451682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:36,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093320664] [2021-05-21 15:55:36,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:36,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:55:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093320664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:36,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:36,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395256317] [2021-05-21 15:55:36,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:36,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:36,880 INFO L87 Difference]: Start difference. First operand 4413 states and 12328 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:37,635 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-05-21 15:55:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:55:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:37,640 INFO L225 Difference]: With dead ends: 6181 [2021-05-21 15:55:37,640 INFO L226 Difference]: Without dead ends: 5911 [2021-05-21 15:55:37,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 767.3ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:55:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-05-21 15:55:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-05-21 15:55:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.797637619790506) internal successors, (12553), 4487 states have internal predecessors, (12553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-05-21 15:55:37,686 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-05-21 15:55:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:37,687 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-05-21 15:55:37,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-05-21 15:55:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:37,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:37,690 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:37,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-05-21 15:55:37,897 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash 893356261, now seen corresponding path program 360 times [2021-05-21 15:55:37,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:37,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502569307] [2021-05-21 15:55:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:38,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502569307] [2021-05-21 15:55:38,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502569307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948274813] [2021-05-21 15:55:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:38,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:55:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948274813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:38,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:38,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:38,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572665172] [2021-05-21 15:55:38,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:38,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:38,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:38,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:38,389 INFO L87 Difference]: Start difference. First operand 4488 states and 12553 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:39,272 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-05-21 15:55:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:55:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:39,277 INFO L225 Difference]: With dead ends: 6206 [2021-05-21 15:55:39,277 INFO L226 Difference]: Without dead ends: 5936 [2021-05-21 15:55:39,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:55:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-05-21 15:55:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-05-21 15:55:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.800964489259097) internal successors, (12778), 4562 states have internal predecessors, (12778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-05-21 15:55:39,325 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-05-21 15:55:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:39,325 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-05-21 15:55:39,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-05-21 15:55:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:39,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:39,329 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:39,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-05-21 15:55:39,529 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash -498593837, now seen corresponding path program 361 times [2021-05-21 15:55:39,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:39,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859267519] [2021-05-21 15:55:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:39,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859267519] [2021-05-21 15:55:39,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859267519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764220576] [2021-05-21 15:55:39,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:40,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764220576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:40,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:40,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:40,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940127598] [2021-05-21 15:55:40,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:40,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:40,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:40,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:40,023 INFO L87 Difference]: Start difference. First operand 4563 states and 12778 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:40,765 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-05-21 15:55:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:55:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:40,771 INFO L225 Difference]: With dead ends: 6231 [2021-05-21 15:55:40,771 INFO L226 Difference]: Without dead ends: 5961 [2021-05-21 15:55:40,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 781.1ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:55:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-05-21 15:55:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-05-21 15:55:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.8041837394867373) internal successors, (13003), 4637 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-05-21 15:55:40,817 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-05-21 15:55:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:40,818 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-05-21 15:55:40,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-05-21 15:55:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:40,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:40,821 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:41,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:41,021 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:41,022 INFO L82 PathProgramCache]: Analyzing trace with hash -743671133, now seen corresponding path program 362 times [2021-05-21 15:55:41,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:41,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472520975] [2021-05-21 15:55:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:41,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:41,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472520975] [2021-05-21 15:55:41,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472520975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:41,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68717438] [2021-05-21 15:55:41,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:41,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:55:41,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:41,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:41,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:41,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68717438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:41,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:41,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454764150] [2021-05-21 15:55:41,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:41,493 INFO L87 Difference]: Start difference. First operand 4638 states and 13003 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:42,433 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-05-21 15:55:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:55:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:42,438 INFO L225 Difference]: With dead ends: 6256 [2021-05-21 15:55:42,438 INFO L226 Difference]: Without dead ends: 5986 [2021-05-21 15:55:42,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 937.4ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:55:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-05-21 15:55:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-05-21 15:55:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.807300509337861) internal successors, (13228), 4712 states have internal predecessors, (13228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-05-21 15:55:42,487 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-05-21 15:55:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:42,487 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-05-21 15:55:42,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-05-21 15:55:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:42,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:42,491 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:42,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-05-21 15:55:42,691 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1120521455, now seen corresponding path program 363 times [2021-05-21 15:55:42,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:42,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704139060] [2021-05-21 15:55:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:42,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:42,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704139060] [2021-05-21 15:55:42,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704139060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:42,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296022581] [2021-05-21 15:55:42,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:43,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:55:43,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:43,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296022581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:43,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:43,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:43,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981585550] [2021-05-21 15:55:43,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:43,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:43,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:43,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:43,152 INFO L87 Difference]: Start difference. First operand 4713 states and 13228 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:43,984 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-05-21 15:55:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:55:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:43,990 INFO L225 Difference]: With dead ends: 6281 [2021-05-21 15:55:43,990 INFO L226 Difference]: Without dead ends: 6011 [2021-05-21 15:55:43,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:55:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-05-21 15:55:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-05-21 15:55:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.810319615625653) internal successors, (13453), 4787 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-05-21 15:55:44,039 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-05-21 15:55:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:44,039 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-05-21 15:55:44,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-05-21 15:55:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:44,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:44,043 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:44,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:44,244 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash 206234081, now seen corresponding path program 364 times [2021-05-21 15:55:44,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:44,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41865922] [2021-05-21 15:55:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:44,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:44,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41865922] [2021-05-21 15:55:44,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41865922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:44,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740899324] [2021-05-21 15:55:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:44,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:55:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:44,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740899324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:44,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:44,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:44,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30815927] [2021-05-21 15:55:44,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:44,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:44,841 INFO L87 Difference]: Start difference. First operand 4788 states and 13453 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:45,860 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-05-21 15:55:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:55:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:45,867 INFO L225 Difference]: With dead ends: 6306 [2021-05-21 15:55:45,867 INFO L226 Difference]: Without dead ends: 6036 [2021-05-21 15:55:45,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:55:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-05-21 15:55:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-05-21 15:55:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.8132455779514602) internal successors, (13678), 4862 states have internal predecessors, (13678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-05-21 15:55:45,925 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-05-21 15:55:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:45,925 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-05-21 15:55:45,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-05-21 15:55:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:45,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:45,929 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:46,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:46,129 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash 660450255, now seen corresponding path program 365 times [2021-05-21 15:55:46,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:46,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107801780] [2021-05-21 15:55:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:46,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107801780] [2021-05-21 15:55:46,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107801780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167359324] [2021-05-21 15:55:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:46,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:55:46,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167359324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:46,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:46,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:46,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758205411] [2021-05-21 15:55:46,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:46,576 INFO L87 Difference]: Start difference. First operand 4863 states and 13678 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:47,455 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-05-21 15:55:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:55:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:47,462 INFO L225 Difference]: With dead ends: 6331 [2021-05-21 15:55:47,462 INFO L226 Difference]: Without dead ends: 6061 [2021-05-21 15:55:47,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:55:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-05-21 15:55:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-05-21 15:55:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.8160826412801296) internal successors, (13903), 4937 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-05-21 15:55:47,520 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-05-21 15:55:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:47,520 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-05-21 15:55:47,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-05-21 15:55:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:47,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:47,524 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:47,725 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1659346591, now seen corresponding path program 366 times [2021-05-21 15:55:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362380637] [2021-05-21 15:55:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:47,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:47,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362380637] [2021-05-21 15:55:47,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362380637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:47,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487473384] [2021-05-21 15:55:47,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:48,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:55:48,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:48,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:48,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487473384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:48,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:48,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:48,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668793821] [2021-05-21 15:55:48,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:48,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:48,199 INFO L87 Difference]: Start difference. First operand 4938 states and 13903 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:49,212 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-05-21 15:55:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:55:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:49,217 INFO L225 Difference]: With dead ends: 6356 [2021-05-21 15:55:49,217 INFO L226 Difference]: Without dead ends: 6086 [2021-05-21 15:55:49,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 997.6ms TimeCoverageRelationStatistics Valid=1841, Invalid=5299, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:55:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-05-21 15:55:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-05-21 15:55:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.818834796488428) internal successors, (14128), 5012 states have internal predecessors, (14128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-05-21 15:55:49,286 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-05-21 15:55:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:49,286 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-05-21 15:55:49,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-05-21 15:55:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:49,289 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:49,289 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:49,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:49,490 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:49,490 INFO L82 PathProgramCache]: Analyzing trace with hash -219981299, now seen corresponding path program 367 times [2021-05-21 15:55:49,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:49,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669515261] [2021-05-21 15:55:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:49,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669515261] [2021-05-21 15:55:49,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669515261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843317430] [2021-05-21 15:55:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:49,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843317430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:49,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:49,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606613237] [2021-05-21 15:55:49,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:49,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:49,925 INFO L87 Difference]: Start difference. First operand 5013 states and 14128 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:50,783 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-05-21 15:55:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:55:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:50,789 INFO L225 Difference]: With dead ends: 6381 [2021-05-21 15:55:50,789 INFO L226 Difference]: Without dead ends: 6111 [2021-05-21 15:55:50,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:55:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-05-21 15:55:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-05-21 15:55:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.821505799095734) internal successors, (14353), 5087 states have internal predecessors, (14353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-05-21 15:55:50,841 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-05-21 15:55:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:50,841 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-05-21 15:55:50,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-05-21 15:55:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:50,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:50,845 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:51,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-05-21 15:55:51,045 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1810338013, now seen corresponding path program 368 times [2021-05-21 15:55:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:51,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534720732] [2021-05-21 15:55:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:51,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534720732] [2021-05-21 15:55:51,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534720732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056810293] [2021-05-21 15:55:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:51,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:55:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:51,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:51,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056810293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:51,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:51,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:51,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400354309] [2021-05-21 15:55:51,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:51,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:51,494 INFO L87 Difference]: Start difference. First operand 5088 states and 14353 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:52,562 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-05-21 15:55:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:55:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:52,568 INFO L225 Difference]: With dead ends: 6406 [2021-05-21 15:55:52,568 INFO L226 Difference]: Without dead ends: 6136 [2021-05-21 15:55:52,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1031.1ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:55:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-05-21 15:55:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-05-21 15:55:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.824099186361875) internal successors, (14578), 5162 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-05-21 15:55:52,621 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-05-21 15:55:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:52,621 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-05-21 15:55:52,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-05-21 15:55:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:52,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:52,625 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:52,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-05-21 15:55:52,825 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1870389813, now seen corresponding path program 369 times [2021-05-21 15:55:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769355828] [2021-05-21 15:55:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:53,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:53,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769355828] [2021-05-21 15:55:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769355828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:53,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689713674] [2021-05-21 15:55:53,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:53,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-21 15:55:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:53,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:53,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:53,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689713674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:53,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:53,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:53,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736871141] [2021-05-21 15:55:53,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:53,277 INFO L87 Difference]: Start difference. First operand 5163 states and 14578 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:54,188 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-05-21 15:55:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:55:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:54,193 INFO L225 Difference]: With dead ends: 6431 [2021-05-21 15:55:54,193 INFO L226 Difference]: Without dead ends: 6161 [2021-05-21 15:55:54,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 875.3ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:55:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-05-21 15:55:54,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-05-21 15:55:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.8266182929157915) internal successors, (14803), 5237 states have internal predecessors, (14803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-05-21 15:55:54,245 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-05-21 15:55:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:54,245 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-05-21 15:55:54,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-05-21 15:55:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:54,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:54,250 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:54,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-05-21 15:55:54,450 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:54,450 INFO L82 PathProgramCache]: Analyzing trace with hash 709335195, now seen corresponding path program 370 times [2021-05-21 15:55:54,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:54,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936857528] [2021-05-21 15:55:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:54,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:54,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936857528] [2021-05-21 15:55:54,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936857528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:54,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722443967] [2021-05-21 15:55:54,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:54,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:55:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:54,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722443967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:54,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:54,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:54,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116386673] [2021-05-21 15:55:54,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:54,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:54,912 INFO L87 Difference]: Start difference. First operand 5238 states and 14803 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:56,037 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-05-21 15:55:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 15:55:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:56,043 INFO L225 Difference]: With dead ends: 6516 [2021-05-21 15:55:56,044 INFO L226 Difference]: Without dead ends: 6246 [2021-05-21 15:55:56,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1087.8ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:55:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-05-21 15:55:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-05-21 15:55:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8328313253012047) internal successors, (15048), 5312 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-05-21 15:55:56,129 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-05-21 15:55:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:56,129 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-05-21 15:55:56,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-05-21 15:55:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:56,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:56,133 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:56,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-05-21 15:55:56,334 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:56,334 INFO L82 PathProgramCache]: Analyzing trace with hash -323312407, now seen corresponding path program 371 times [2021-05-21 15:55:56,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:56,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105199129] [2021-05-21 15:55:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:56,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:56,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105199129] [2021-05-21 15:55:56,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105199129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:56,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487290386] [2021-05-21 15:55:56,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:56,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-21 15:55:56,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:56,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:56,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487290386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:56,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:56,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-05-21 15:55:56,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012384386] [2021-05-21 15:55:56,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 15:55:56,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 15:55:56,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:55:56,784 INFO L87 Difference]: Start difference. First operand 5313 states and 15048 transitions. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:57,740 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-05-21 15:55:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 15:55:57,741 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:57,747 INFO L225 Difference]: With dead ends: 7258 [2021-05-21 15:55:57,747 INFO L226 Difference]: Without dead ends: 6988 [2021-05-21 15:55:57,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 930.3ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:55:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-05-21 15:55:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-05-21 15:55:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.841769847050255) internal successors, (15607), 5492 states have internal predecessors, (15607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-05-21 15:55:57,802 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-05-21 15:55:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:57,802 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-05-21 15:55:57,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-05-21 15:55:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-21 15:55:57,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:57,806 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:58,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:58,006 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:58,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:58,006 INFO L82 PathProgramCache]: Analyzing trace with hash -300969157, now seen corresponding path program 372 times [2021-05-21 15:55:58,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:58,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481876740] [2021-05-21 15:55:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:55:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:58,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:55:58,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481876740] [2021-05-21 15:55:58,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481876740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247838319] [2021-05-21 15:55:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:55:58,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-21 15:55:58,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:55:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 15:55:58,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:55:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:55:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247838319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:55:58,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:55:58,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-05-21 15:55:58,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591549781] [2021-05-21 15:55:58,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:55:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:55:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:55:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:55:58,509 INFO L87 Difference]: Start difference. First operand 5493 states and 15607 transitions. Second operand has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:55:59,639 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-05-21 15:55:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 15:55:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-05-21 15:55:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:55:59,645 INFO L225 Difference]: With dead ends: 6720 [2021-05-21 15:55:59,645 INFO L226 Difference]: Without dead ends: 6231 [2021-05-21 15:55:59,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1116.2ms TimeCoverageRelationStatistics Valid=2366, Invalid=5824, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 15:55:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-05-21 15:55:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-05-21 15:55:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7427905621905038) internal successors, (9416), 3433 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-05-21 15:55:59,685 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-05-21 15:55:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:55:59,685 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-05-21 15:55:59,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.0606060606060606) internal successors, (167), 33 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:55:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-05-21 15:55:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:55:59,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:55:59,688 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:55:59,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-05-21 15:55:59,888 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:55:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:55:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash 33638321, now seen corresponding path program 373 times [2021-05-21 15:55:59,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:55:59,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038051052] [2021-05-21 15:55:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:55:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:00,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038051052] [2021-05-21 15:56:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038051052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808200382] [2021-05-21 15:56:00,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:00,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808200382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:00,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:00,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-05-21 15:56:00,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566540105] [2021-05-21 15:56:00,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:56:00,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:56:00,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:56:00,441 INFO L87 Difference]: Start difference. First operand 3434 states and 9416 transitions. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:01,076 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-05-21 15:56:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:56:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:01,080 INFO L225 Difference]: With dead ends: 4774 [2021-05-21 15:56:01,080 INFO L226 Difference]: Without dead ends: 4440 [2021-05-21 15:56:01,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:56:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-05-21 15:56:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-05-21 15:56:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 2.72484366117112) internal successors, (9586), 3518 states have internal predecessors, (9586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-05-21 15:56:01,111 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-05-21 15:56:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:01,111 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-05-21 15:56:01,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-05-21 15:56:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:01,114 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:01,114 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:01,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:01,321 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash 117467253, now seen corresponding path program 374 times [2021-05-21 15:56:01,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:01,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645000578] [2021-05-21 15:56:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:01,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:01,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645000578] [2021-05-21 15:56:01,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645000578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:01,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735033246] [2021-05-21 15:56:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:01,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:01,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:01,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:01,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735033246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:01,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:01,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:01,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77332025] [2021-05-21 15:56:01,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:01,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:01,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:01,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:01,850 INFO L87 Difference]: Start difference. First operand 3519 states and 9586 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:02,363 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-05-21 15:56:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:56:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:02,368 INFO L225 Difference]: With dead ends: 6096 [2021-05-21 15:56:02,368 INFO L226 Difference]: Without dead ends: 5826 [2021-05-21 15:56:02,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:56:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-05-21 15:56:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-05-21 15:56:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.7315674494811577) internal successors, (10003), 3662 states have internal predecessors, (10003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-05-21 15:56:02,406 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-05-21 15:56:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:02,406 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-05-21 15:56:02,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-05-21 15:56:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:02,409 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:02,409 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:02,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:02,609 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 815182661, now seen corresponding path program 375 times [2021-05-21 15:56:02,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:02,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991676496] [2021-05-21 15:56:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:02,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:02,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991676496] [2021-05-21 15:56:02,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991676496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:02,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951807362] [2021-05-21 15:56:02,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:02,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:56:02,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951807362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:03,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:03,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:03,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113853565] [2021-05-21 15:56:03,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:03,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:03,197 INFO L87 Difference]: Start difference. First operand 3663 states and 10003 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:03,768 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-05-21 15:56:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:56:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:03,775 INFO L225 Difference]: With dead ends: 6056 [2021-05-21 15:56:03,775 INFO L226 Difference]: Without dead ends: 5786 [2021-05-21 15:56:03,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 715.9ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:56:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-05-21 15:56:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-05-21 15:56:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7369547765587368) internal successors, (10228), 3737 states have internal predecessors, (10228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-05-21 15:56:03,813 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-05-21 15:56:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:03,813 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-05-21 15:56:03,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-05-21 15:56:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:03,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:03,816 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:04,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:04,017 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash -904699981, now seen corresponding path program 376 times [2021-05-21 15:56:04,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:04,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452792565] [2021-05-21 15:56:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:04,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:04,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452792565] [2021-05-21 15:56:04,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452792565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:04,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860368383] [2021-05-21 15:56:04,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:04,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:56:04,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:04,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860368383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:04,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:04,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:04,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081971945] [2021-05-21 15:56:04,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:04,561 INFO L87 Difference]: Start difference. First operand 3738 states and 10228 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:05,094 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-05-21 15:56:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:56:05,094 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:05,100 INFO L225 Difference]: With dead ends: 6106 [2021-05-21 15:56:05,100 INFO L226 Difference]: Without dead ends: 5836 [2021-05-21 15:56:05,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:56:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-05-21 15:56:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-05-21 15:56:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.742130115424974) internal successors, (10453), 3812 states have internal predecessors, (10453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-05-21 15:56:05,137 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-05-21 15:56:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:05,138 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-05-21 15:56:05,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-05-21 15:56:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:05,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:05,141 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:05,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:05,341 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1406013821, now seen corresponding path program 377 times [2021-05-21 15:56:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:05,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4519934] [2021-05-21 15:56:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:05,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4519934] [2021-05-21 15:56:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4519934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126238159] [2021-05-21 15:56:05,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:05,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:56:05,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:05,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:05,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126238159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:05,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:05,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:05,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45948340] [2021-05-21 15:56:05,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:05,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:05,939 INFO L87 Difference]: Start difference. First operand 3813 states and 10453 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:06,570 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-05-21 15:56:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:56:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:06,575 INFO L225 Difference]: With dead ends: 6131 [2021-05-21 15:56:06,575 INFO L226 Difference]: Without dead ends: 5861 [2021-05-21 15:56:06,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:56:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-05-21 15:56:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-05-21 15:56:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.7471057370722924) internal successors, (10678), 3887 states have internal predecessors, (10678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-05-21 15:56:06,616 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-05-21 15:56:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:06,616 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-05-21 15:56:06,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-05-21 15:56:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:06,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:06,619 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:06,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:06,819 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -929518479, now seen corresponding path program 378 times [2021-05-21 15:56:06,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:06,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216614709] [2021-05-21 15:56:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:07,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216614709] [2021-05-21 15:56:07,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216614709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33834135] [2021-05-21 15:56:07,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:07,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:56:07,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:07,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33834135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:07,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:07,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:07,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727028267] [2021-05-21 15:56:07,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:07,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:07,349 INFO L87 Difference]: Start difference. First operand 3888 states and 10678 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:07,952 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-05-21 15:56:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:56:07,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:07,956 INFO L225 Difference]: With dead ends: 6156 [2021-05-21 15:56:07,956 INFO L226 Difference]: Without dead ends: 5886 [2021-05-21 15:56:07,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:56:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-05-21 15:56:07,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-05-21 15:56:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.7518929833417465) internal successors, (10903), 3962 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-05-21 15:56:07,993 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-05-21 15:56:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:07,994 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-05-21 15:56:07,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-05-21 15:56:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:07,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:07,997 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:08,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-05-21 15:56:08,197 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash 537165633, now seen corresponding path program 379 times [2021-05-21 15:56:08,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:08,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024052291] [2021-05-21 15:56:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:08,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024052291] [2021-05-21 15:56:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024052291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:08,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384944368] [2021-05-21 15:56:08,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:08,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384944368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:08,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:08,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:08,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684128441] [2021-05-21 15:56:08,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:08,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:08,731 INFO L87 Difference]: Start difference. First operand 3963 states and 10903 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:09,402 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-05-21 15:56:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:56:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:09,408 INFO L225 Difference]: With dead ends: 6181 [2021-05-21 15:56:09,408 INFO L226 Difference]: Without dead ends: 5911 [2021-05-21 15:56:09,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 782.4ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:56:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-05-21 15:56:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-05-21 15:56:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.7565023532325985) internal successors, (11128), 4037 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-05-21 15:56:09,450 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-05-21 15:56:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:09,450 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-05-21 15:56:09,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-05-21 15:56:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:09,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:09,453 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:09,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-05-21 15:56:09,654 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash 401944239, now seen corresponding path program 380 times [2021-05-21 15:56:09,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:09,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454029749] [2021-05-21 15:56:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:09,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454029749] [2021-05-21 15:56:09,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454029749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101841246] [2021-05-21 15:56:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:09,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101841246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:10,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:10,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:10,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119259260] [2021-05-21 15:56:10,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:10,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:10,171 INFO L87 Difference]: Start difference. First operand 4038 states and 11128 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:10,800 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-05-21 15:56:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:56:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:10,805 INFO L225 Difference]: With dead ends: 6206 [2021-05-21 15:56:10,805 INFO L226 Difference]: Without dead ends: 5936 [2021-05-21 15:56:10,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:56:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-05-21 15:56:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-05-21 15:56:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.760943579766537) internal successors, (11353), 4112 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-05-21 15:56:10,846 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-05-21 15:56:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:10,846 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-05-21 15:56:10,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-05-21 15:56:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:10,849 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:10,849 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:11,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-05-21 15:56:11,049 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -474790529, now seen corresponding path program 381 times [2021-05-21 15:56:11,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:11,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503401713] [2021-05-21 15:56:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:11,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503401713] [2021-05-21 15:56:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503401713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:11,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314217701] [2021-05-21 15:56:11,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:11,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:56:11,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:11,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314217701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:11,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:11,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:11,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433845794] [2021-05-21 15:56:11,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:11,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:11,584 INFO L87 Difference]: Start difference. First operand 4113 states and 11353 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:12,322 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-05-21 15:56:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:56:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:12,327 INFO L225 Difference]: With dead ends: 6231 [2021-05-21 15:56:12,327 INFO L226 Difference]: Without dead ends: 5961 [2021-05-21 15:56:12,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=1278, Invalid=4124, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:56:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-05-21 15:56:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-05-21 15:56:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.7652256985908763) internal successors, (11578), 4187 states have internal predecessors, (11578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-05-21 15:56:12,368 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-05-21 15:56:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:12,368 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-05-21 15:56:12,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-05-21 15:56:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:12,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:12,371 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:12,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-05-21 15:56:12,572 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2082850413, now seen corresponding path program 382 times [2021-05-21 15:56:12,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:12,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507957062] [2021-05-21 15:56:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:12,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507957062] [2021-05-21 15:56:12,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507957062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90520866] [2021-05-21 15:56:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:12,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:56:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:13,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90520866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:13,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:13,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:13,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175972300] [2021-05-21 15:56:13,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:13,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:13,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:13,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:13,058 INFO L87 Difference]: Start difference. First operand 4188 states and 11578 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:13,731 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-05-21 15:56:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:56:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:13,737 INFO L225 Difference]: With dead ends: 6256 [2021-05-21 15:56:13,737 INFO L226 Difference]: Without dead ends: 5986 [2021-05-21 15:56:13,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:56:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-05-21 15:56:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-05-21 15:56:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.7693571093383387) internal successors, (11803), 4262 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-05-21 15:56:13,780 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-05-21 15:56:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:13,780 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-05-21 15:56:13,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-05-21 15:56:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:13,783 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:13,783 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:13,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:13,984 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash -847568579, now seen corresponding path program 383 times [2021-05-21 15:56:13,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:13,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645135298] [2021-05-21 15:56:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:14,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:14,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645135298] [2021-05-21 15:56:14,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645135298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:14,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329407932] [2021-05-21 15:56:14,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:14,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:56:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:14,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329407932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:14,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:14,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:14,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110713203] [2021-05-21 15:56:14,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:14,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:14,497 INFO L87 Difference]: Start difference. First operand 4263 states and 11803 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:15,306 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-05-21 15:56:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:56:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:15,312 INFO L225 Difference]: With dead ends: 6281 [2021-05-21 15:56:15,312 INFO L226 Difference]: Without dead ends: 6011 [2021-05-21 15:56:15,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 881.6ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:56:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-05-21 15:56:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-05-21 15:56:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 2.7733456306202444) internal successors, (12028), 4337 states have internal predecessors, (12028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-05-21 15:56:15,354 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-05-21 15:56:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:15,354 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-05-21 15:56:15,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-05-21 15:56:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:15,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:15,357 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:15,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:15,558 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:15,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1170166699, now seen corresponding path program 384 times [2021-05-21 15:56:15,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:15,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578327785] [2021-05-21 15:56:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:15,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:15,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578327785] [2021-05-21 15:56:15,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578327785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:15,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455685277] [2021-05-21 15:56:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:15,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:56:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:15,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:15,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455685277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:16,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:16,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:16,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965150743] [2021-05-21 15:56:16,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:16,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:16,075 INFO L87 Difference]: Start difference. First operand 4338 states and 12028 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:16,770 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-05-21 15:56:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:56:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:16,776 INFO L225 Difference]: With dead ends: 6306 [2021-05-21 15:56:16,776 INFO L226 Difference]: Without dead ends: 6036 [2021-05-21 15:56:16,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 755.4ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:56:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-05-21 15:56:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-05-21 15:56:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.777198549410698) internal successors, (12253), 4412 states have internal predecessors, (12253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-05-21 15:56:16,842 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-05-21 15:56:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:16,842 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-05-21 15:56:16,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-05-21 15:56:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:16,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:16,845 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:17,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-05-21 15:56:17,046 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 271643259, now seen corresponding path program 385 times [2021-05-21 15:56:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:17,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373660663] [2021-05-21 15:56:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:17,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373660663] [2021-05-21 15:56:17,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373660663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507432146] [2021-05-21 15:56:17,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:17,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507432146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:17,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:17,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:17,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205658636] [2021-05-21 15:56:17,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:17,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:17,542 INFO L87 Difference]: Start difference. First operand 4413 states and 12253 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:18,412 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-05-21 15:56:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:56:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:18,418 INFO L225 Difference]: With dead ends: 6331 [2021-05-21 15:56:18,418 INFO L226 Difference]: Without dead ends: 6061 [2021-05-21 15:56:18,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 896.7ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:56:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-05-21 15:56:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-05-21 15:56:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.7809226654780477) internal successors, (12478), 4487 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-05-21 15:56:18,463 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-05-21 15:56:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:18,463 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-05-21 15:56:18,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-05-21 15:56:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:18,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:18,466 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:18,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:18,667 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1343310231, now seen corresponding path program 386 times [2021-05-21 15:56:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:18,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335986827] [2021-05-21 15:56:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:18,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:18,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335986827] [2021-05-21 15:56:18,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335986827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:18,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741784964] [2021-05-21 15:56:18,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:18,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:19,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741784964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:19,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:19,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63076920] [2021-05-21 15:56:19,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:19,163 INFO L87 Difference]: Start difference. First operand 4488 states and 12478 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:19,898 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-05-21 15:56:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:56:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:19,903 INFO L225 Difference]: With dead ends: 6356 [2021-05-21 15:56:19,903 INFO L226 Difference]: Without dead ends: 6086 [2021-05-21 15:56:19,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:56:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-05-21 15:56:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-05-21 15:56:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.7845243314335817) internal successors, (12703), 4562 states have internal predecessors, (12703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-05-21 15:56:19,950 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-05-21 15:56:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:19,950 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-05-21 15:56:19,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-05-21 15:56:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:19,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:19,953 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:20,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-05-21 15:56:20,154 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1723754183, now seen corresponding path program 387 times [2021-05-21 15:56:20,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:20,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016899109] [2021-05-21 15:56:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:20,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:20,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016899109] [2021-05-21 15:56:20,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016899109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:20,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780322985] [2021-05-21 15:56:20,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:20,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:56:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:20,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780322985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:20,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:20,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:20,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270284678] [2021-05-21 15:56:20,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:20,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:20,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:20,668 INFO L87 Difference]: Start difference. First operand 4563 states and 12703 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:21,600 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-05-21 15:56:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:56:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:21,604 INFO L225 Difference]: With dead ends: 6381 [2021-05-21 15:56:21,604 INFO L226 Difference]: Without dead ends: 6111 [2021-05-21 15:56:21,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=1485, Invalid=4835, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:56:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-05-21 15:56:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-05-21 15:56:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 2.7880094888936813) internal successors, (12928), 4637 states have internal predecessors, (12928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-05-21 15:56:21,648 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-05-21 15:56:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:21,648 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-05-21 15:56:21,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-05-21 15:56:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:21,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:21,652 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:21,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:21,852 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1099379033, now seen corresponding path program 388 times [2021-05-21 15:56:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:21,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062653428] [2021-05-21 15:56:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:22,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:22,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062653428] [2021-05-21 15:56:22,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062653428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:22,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28963906] [2021-05-21 15:56:22,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:22,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:56:22,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28963906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:22,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:22,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088442947] [2021-05-21 15:56:22,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:22,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:22,367 INFO L87 Difference]: Start difference. First operand 4638 states and 12928 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:23,140 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-05-21 15:56:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:56:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:23,146 INFO L225 Difference]: With dead ends: 6406 [2021-05-21 15:56:23,146 INFO L226 Difference]: Without dead ends: 6136 [2021-05-21 15:56:23,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:56:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-05-21 15:56:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-05-21 15:56:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.791383701188455) internal successors, (13153), 4712 states have internal predecessors, (13153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-05-21 15:56:23,195 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-05-21 15:56:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:23,195 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-05-21 15:56:23,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-05-21 15:56:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:23,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:23,198 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:23,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:23,399 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash -290327177, now seen corresponding path program 389 times [2021-05-21 15:56:23,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:23,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109020397] [2021-05-21 15:56:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:23,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:23,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109020397] [2021-05-21 15:56:23,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109020397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:23,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582959717] [2021-05-21 15:56:23,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:23,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:56:23,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:23,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:23,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582959717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:23,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:23,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806895576] [2021-05-21 15:56:23,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:23,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:23,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:23,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:23,919 INFO L87 Difference]: Start difference. First operand 4713 states and 13153 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:24,915 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-05-21 15:56:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:56:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:24,922 INFO L225 Difference]: With dead ends: 6431 [2021-05-21 15:56:24,922 INFO L226 Difference]: Without dead ends: 6161 [2021-05-21 15:56:24,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1009.6ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:56:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-05-21 15:56:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-05-21 15:56:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4788 states, 4787 states have (on average 2.794652182995613) internal successors, (13378), 4787 states have internal predecessors, (13378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-05-21 15:56:24,976 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-05-21 15:56:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:24,977 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-05-21 15:56:24,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-05-21 15:56:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:24,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:24,980 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:25,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:25,196 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1682277275, now seen corresponding path program 390 times [2021-05-21 15:56:25,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:25,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593277026] [2021-05-21 15:56:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:25,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:25,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593277026] [2021-05-21 15:56:25,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593277026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:25,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645952574] [2021-05-21 15:56:25,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:25,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:56:25,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:25,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:25,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645952574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:25,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:25,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:25,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539297408] [2021-05-21 15:56:25,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:25,720 INFO L87 Difference]: Start difference. First operand 4788 states and 13378 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:26,603 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-05-21 15:56:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:56:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:26,608 INFO L225 Difference]: With dead ends: 6456 [2021-05-21 15:56:26,608 INFO L226 Difference]: Without dead ends: 6186 [2021-05-21 15:56:26,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:56:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-05-21 15:56:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-05-21 15:56:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4862 states have (on average 2.7978198272315917) internal successors, (13603), 4862 states have internal predecessors, (13603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-05-21 15:56:26,658 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-05-21 15:56:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:26,659 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-05-21 15:56:26,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-05-21 15:56:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:26,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:26,662 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:26,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-05-21 15:56:26,873 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1927354571, now seen corresponding path program 391 times [2021-05-21 15:56:26,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:26,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435406478] [2021-05-21 15:56:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:27,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:27,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435406478] [2021-05-21 15:56:27,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435406478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:27,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186895766] [2021-05-21 15:56:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:27,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:27,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:27,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186895766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:27,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:27,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:27,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718568797] [2021-05-21 15:56:27,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:27,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:27,368 INFO L87 Difference]: Start difference. First operand 4863 states and 13603 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:28,396 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-05-21 15:56:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:56:28,396 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:28,402 INFO L225 Difference]: With dead ends: 6481 [2021-05-21 15:56:28,402 INFO L226 Difference]: Without dead ends: 6211 [2021-05-21 15:56:28,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1027.4ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 15:56:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-05-21 15:56:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-05-21 15:56:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 2.800891229491594) internal successors, (13828), 4937 states have internal predecessors, (13828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-05-21 15:56:28,478 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-05-21 15:56:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:28,478 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-05-21 15:56:28,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-05-21 15:56:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:28,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:28,482 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:28,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:28,682 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:28,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1990762403, now seen corresponding path program 392 times [2021-05-21 15:56:28,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:28,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927998766] [2021-05-21 15:56:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:28,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927998766] [2021-05-21 15:56:28,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927998766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663158864] [2021-05-21 15:56:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:28,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:29,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663158864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:29,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:29,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948543761] [2021-05-21 15:56:29,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:29,154 INFO L87 Difference]: Start difference. First operand 4938 states and 13828 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:30,035 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-05-21 15:56:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:56:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:30,041 INFO L225 Difference]: With dead ends: 6506 [2021-05-21 15:56:30,041 INFO L226 Difference]: Without dead ends: 6236 [2021-05-21 15:56:30,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:56:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-05-21 15:56:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-05-21 15:56:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.8038707102952913) internal successors, (14053), 5012 states have internal predecessors, (14053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-05-21 15:56:30,094 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-05-21 15:56:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:30,094 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-05-21 15:56:30,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-05-21 15:56:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:30,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:30,098 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:30,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-05-21 15:56:30,298 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash -977449357, now seen corresponding path program 393 times [2021-05-21 15:56:30,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:30,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294050958] [2021-05-21 15:56:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:30,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294050958] [2021-05-21 15:56:30,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294050958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296021208] [2021-05-21 15:56:30,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:30,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:56:30,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:30,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296021208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:30,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:30,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:30,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309596212] [2021-05-21 15:56:30,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:30,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:30,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:30,820 INFO L87 Difference]: Start difference. First operand 5013 states and 14053 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:31,888 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-05-21 15:56:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:56:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:31,894 INFO L225 Difference]: With dead ends: 6531 [2021-05-21 15:56:31,894 INFO L226 Difference]: Without dead ends: 6261 [2021-05-21 15:56:31,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1038.6ms TimeCoverageRelationStatistics Valid=1836, Invalid=5474, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 15:56:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-05-21 15:56:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-05-21 15:56:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 2.806762335364655) internal successors, (14278), 5087 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-05-21 15:56:31,946 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-05-21 15:56:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:31,946 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-05-21 15:56:31,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-05-21 15:56:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:31,950 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:31,950 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:32,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-05-21 15:56:32,150 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash -523233183, now seen corresponding path program 394 times [2021-05-21 15:56:32,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:32,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970465049] [2021-05-21 15:56:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:32,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970465049] [2021-05-21 15:56:32,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970465049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778956747] [2021-05-21 15:56:32,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:32,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:56:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:32,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778956747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:32,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:32,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:32,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306769975] [2021-05-21 15:56:32,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:32,616 INFO L87 Difference]: Start difference. First operand 5088 states and 14278 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:33,516 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-05-21 15:56:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:56:33,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:33,522 INFO L225 Difference]: With dead ends: 6556 [2021-05-21 15:56:33,522 INFO L226 Difference]: Without dead ends: 6286 [2021-05-21 15:56:33,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 880.8ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 15:56:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-05-21 15:56:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-05-21 15:56:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 2.8095699341340565) internal successors, (14503), 5162 states have internal predecessors, (14503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-05-21 15:56:33,572 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-05-21 15:56:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:33,572 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-05-21 15:56:33,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-05-21 15:56:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:33,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:33,576 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:33,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:33,776 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash 475663153, now seen corresponding path program 395 times [2021-05-21 15:56:33,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:33,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572407003] [2021-05-21 15:56:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:34,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:34,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572407003] [2021-05-21 15:56:34,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572407003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:34,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450904263] [2021-05-21 15:56:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:34,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:56:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450904263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:34,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:34,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:34,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162563809] [2021-05-21 15:56:34,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:34,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:34,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:34,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:34,262 INFO L87 Difference]: Start difference. First operand 5163 states and 14503 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:35,423 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-05-21 15:56:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:56:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:35,428 INFO L225 Difference]: With dead ends: 6581 [2021-05-21 15:56:35,428 INFO L226 Difference]: Without dead ends: 6311 [2021-05-21 15:56:35,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1096.6ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 15:56:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-05-21 15:56:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-05-21 15:56:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5237 states have (on average 2.812297116669849) internal successors, (14728), 5237 states have internal predecessors, (14728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-05-21 15:56:35,483 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-05-21 15:56:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:35,483 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-05-21 15:56:35,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-05-21 15:56:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:35,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:35,487 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:35,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-21 15:56:35,688 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1403664737, now seen corresponding path program 396 times [2021-05-21 15:56:35,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:35,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132570157] [2021-05-21 15:56:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:35,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:35,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132570157] [2021-05-21 15:56:35,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132570157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:35,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597281197] [2021-05-21 15:56:35,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:36,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:56:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:36,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597281197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:36,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:36,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:36,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249571235] [2021-05-21 15:56:36,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:36,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:36,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:36,153 INFO L87 Difference]: Start difference. First operand 5238 states and 14728 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:37,133 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-05-21 15:56:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:56:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:37,140 INFO L225 Difference]: With dead ends: 6606 [2021-05-21 15:56:37,140 INFO L226 Difference]: Without dead ends: 6336 [2021-05-21 15:56:37,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 915.7ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 15:56:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-05-21 15:56:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-05-21 15:56:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 2.8149472891566263) internal successors, (14953), 5312 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-05-21 15:56:37,207 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-05-21 15:56:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:37,208 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-05-21 15:56:37,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-05-21 15:56:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:37,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:37,212 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:37,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-21 15:56:37,412 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash 626654575, now seen corresponding path program 397 times [2021-05-21 15:56:37,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:37,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298991728] [2021-05-21 15:56:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:37,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:37,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298991728] [2021-05-21 15:56:37,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298991728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:37,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90107023] [2021-05-21 15:56:37,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:37,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90107023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:37,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:37,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185530581] [2021-05-21 15:56:37,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:37,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:37,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:37,912 INFO L87 Difference]: Start difference. First operand 5313 states and 14953 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:39,089 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-05-21 15:56:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 15:56:39,090 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:39,096 INFO L225 Difference]: With dead ends: 6631 [2021-05-21 15:56:39,096 INFO L226 Difference]: Without dead ends: 6361 [2021-05-21 15:56:39,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1138.6ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 15:56:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-05-21 15:56:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-05-21 15:56:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5387 states have (on average 2.817523668089846) internal successors, (15178), 5387 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-05-21 15:56:39,152 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-05-21 15:56:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:39,153 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-05-21 15:56:39,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-05-21 15:56:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:39,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:39,156 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:39,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:39,357 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1240894045, now seen corresponding path program 398 times [2021-05-21 15:56:39,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:39,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449460892] [2021-05-21 15:56:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:39,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:39,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449460892] [2021-05-21 15:56:39,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449460892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:39,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717217172] [2021-05-21 15:56:39,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:39,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:39,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:39,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717217172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:39,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:39,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580596705] [2021-05-21 15:56:39,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:39,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:39,844 INFO L87 Difference]: Start difference. First operand 5388 states and 15178 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:40,804 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-05-21 15:56:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:56:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:40,811 INFO L225 Difference]: With dead ends: 6656 [2021-05-21 15:56:40,811 INFO L226 Difference]: Without dead ends: 6386 [2021-05-21 15:56:40,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 947.2ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 15:56:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-05-21 15:56:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-05-21 15:56:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 2.8200292932991577) internal successors, (15403), 5462 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-05-21 15:56:40,867 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-05-21 15:56:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:40,867 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-05-21 15:56:40,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-05-21 15:56:40,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:40,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:40,871 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:41,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:41,072 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:41,072 INFO L82 PathProgramCache]: Analyzing trace with hash -474348243, now seen corresponding path program 399 times [2021-05-21 15:56:41,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:41,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963873189] [2021-05-21 15:56:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:41,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:41,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963873189] [2021-05-21 15:56:41,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963873189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:41,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385313707] [2021-05-21 15:56:41,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:41,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:56:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:41,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385313707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:41,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:41,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472195349] [2021-05-21 15:56:41,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:41,561 INFO L87 Difference]: Start difference. First operand 5463 states and 15403 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:42,784 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-05-21 15:56:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 15:56:42,784 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:42,790 INFO L225 Difference]: With dead ends: 6741 [2021-05-21 15:56:42,791 INFO L226 Difference]: Without dead ends: 6471 [2021-05-21 15:56:42,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1194.6ms TimeCoverageRelationStatistics Valid=2331, Invalid=6041, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 15:56:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-05-21 15:56:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-05-21 15:56:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5537 states have (on average 2.826079104208055) internal successors, (15648), 5537 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-05-21 15:56:42,852 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-05-21 15:56:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:42,852 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-05-21 15:56:42,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-05-21 15:56:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:42,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:42,856 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:43,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:43,057 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1506995845, now seen corresponding path program 400 times [2021-05-21 15:56:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:43,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012200131] [2021-05-21 15:56:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:43,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012200131] [2021-05-21 15:56:43,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012200131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:43,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012552887] [2021-05-21 15:56:43,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:43,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:56:43,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:43,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012552887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:43,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:43,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-05-21 15:56:43,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886362636] [2021-05-21 15:56:43,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-21 15:56:43,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:43,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-21 15:56:43,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:56:43,516 INFO L87 Difference]: Start difference. First operand 5538 states and 15648 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:44,543 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-05-21 15:56:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 15:56:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:44,552 INFO L225 Difference]: With dead ends: 7508 [2021-05-21 15:56:44,552 INFO L226 Difference]: Without dead ends: 7238 [2021-05-21 15:56:44,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 985.5ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 15:56:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-05-21 15:56:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-05-21 15:56:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.8348784327444463) internal successors, (16207), 5717 states have internal predecessors, (16207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-05-21 15:56:44,631 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-05-21 15:56:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:44,632 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-05-21 15:56:44,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-05-21 15:56:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-21 15:56:44,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:44,636 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:44,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:44,837 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1484652595, now seen corresponding path program 401 times [2021-05-21 15:56:44,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:44,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966915761] [2021-05-21 15:56:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:45,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:45,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966915761] [2021-05-21 15:56:45,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966915761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:45,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583799683] [2021-05-21 15:56:45,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:45,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:56:45,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:45,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 15:56:45,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:45,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583799683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:45,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:45,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-05-21 15:56:45,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094965935] [2021-05-21 15:56:45,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:45,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:45,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:45,309 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:46,556 INFO L93 Difference]: Finished difference Result 6995 states and 19081 transitions. [2021-05-21 15:56:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 15:56:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-05-21 15:56:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:46,563 INFO L225 Difference]: With dead ends: 6995 [2021-05-21 15:56:46,564 INFO L226 Difference]: Without dead ends: 6506 [2021-05-21 15:56:46,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1212.1ms TimeCoverageRelationStatistics Valid=2531, Invalid=6211, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 15:56:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-05-21 15:56:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 3713. [2021-05-21 15:56:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 3712 states have (on average 2.741918103448276) internal successors, (10178), 3712 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 10178 transitions. [2021-05-21 15:56:46,608 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 10178 transitions. Word has length 170 [2021-05-21 15:56:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:46,608 INFO L482 AbstractCegarLoop]: Abstraction has 3713 states and 10178 transitions. [2021-05-21 15:56:46,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 10178 transitions. [2021-05-21 15:56:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:46,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:46,611 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:46,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:46,811 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -435860238, now seen corresponding path program 402 times [2021-05-21 15:56:46,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:46,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757816424] [2021-05-21 15:56:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:47,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757816424] [2021-05-21 15:56:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757816424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296399613] [2021-05-21 15:56:47,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:47,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:56:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:47,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296399613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:47,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:47,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:56:47,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129846495] [2021-05-21 15:56:47,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:47,396 INFO L87 Difference]: Start difference. First operand 3713 states and 10178 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:47,981 INFO L93 Difference]: Finished difference Result 5531 states and 14017 transitions. [2021-05-21 15:56:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:56:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:47,986 INFO L225 Difference]: With dead ends: 5531 [2021-05-21 15:56:47,986 INFO L226 Difference]: Without dead ends: 5261 [2021-05-21 15:56:47,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 721.2ms TimeCoverageRelationStatistics Valid=1223, Invalid=3333, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:56:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-05-21 15:56:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 3788. [2021-05-21 15:56:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.7470293108001056) internal successors, (10403), 3787 states have internal predecessors, (10403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10403 transitions. [2021-05-21 15:56:48,024 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10403 transitions. Word has length 175 [2021-05-21 15:56:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:48,025 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10403 transitions. [2021-05-21 15:56:48,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10403 transitions. [2021-05-21 15:56:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:48,028 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:48,028 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:48,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-21 15:56:48,228 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 261855170, now seen corresponding path program 403 times [2021-05-21 15:56:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:48,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290359263] [2021-05-21 15:56:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:48,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:48,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290359263] [2021-05-21 15:56:48,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290359263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:48,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579697657] [2021-05-21 15:56:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579697657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:48,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:48,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:56:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670104930] [2021-05-21 15:56:48,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:56:48,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:48,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:56:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:56:48,800 INFO L87 Difference]: Start difference. First operand 3788 states and 10403 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:49,411 INFO L93 Difference]: Finished difference Result 6251 states and 15532 transitions. [2021-05-21 15:56:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:56:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:49,415 INFO L225 Difference]: With dead ends: 6251 [2021-05-21 15:56:49,415 INFO L226 Difference]: Without dead ends: 5981 [2021-05-21 15:56:49,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=1291, Invalid=3679, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:56:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2021-05-21 15:56:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 3863. [2021-05-21 15:56:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.7519419989642673) internal successors, (10628), 3862 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10628 transitions. [2021-05-21 15:56:49,451 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10628 transitions. Word has length 175 [2021-05-21 15:56:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:49,451 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10628 transitions. [2021-05-21 15:56:49,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10628 transitions. [2021-05-21 15:56:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:49,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:49,454 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:49,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-05-21 15:56:49,654 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1458027472, now seen corresponding path program 404 times [2021-05-21 15:56:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:49,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778232366] [2021-05-21 15:56:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:49,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778232366] [2021-05-21 15:56:49,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778232366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908832699] [2021-05-21 15:56:49,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:50,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:50,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:50,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908832699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:50,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:50,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:56:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415854408] [2021-05-21 15:56:50,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:50,186 INFO L87 Difference]: Start difference. First operand 3863 states and 10628 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:50,778 INFO L93 Difference]: Finished difference Result 6281 states and 15667 transitions. [2021-05-21 15:56:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:56:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:50,783 INFO L225 Difference]: With dead ends: 6281 [2021-05-21 15:56:50,783 INFO L226 Difference]: Without dead ends: 6011 [2021-05-21 15:56:50,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 713.4ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 15:56:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-05-21 15:56:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3938. [2021-05-21 15:56:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 2.7566675133350267) internal successors, (10853), 3937 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 10853 transitions. [2021-05-21 15:56:50,824 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 10853 transitions. Word has length 175 [2021-05-21 15:56:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:50,824 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 10853 transitions. [2021-05-21 15:56:50,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 10853 transitions. [2021-05-21 15:56:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:50,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:50,827 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:51,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:51,027 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1959341312, now seen corresponding path program 405 times [2021-05-21 15:56:51,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:51,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244426306] [2021-05-21 15:56:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:51,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:51,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244426306] [2021-05-21 15:56:51,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244426306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:51,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953121138] [2021-05-21 15:56:51,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:51,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:56:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:51,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:51,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953121138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:51,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:51,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:56:51,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695662686] [2021-05-21 15:56:51,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:56:51,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:56:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:56:51,634 INFO L87 Difference]: Start difference. First operand 3938 states and 10853 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:52,336 INFO L93 Difference]: Finished difference Result 6306 states and 15792 transitions. [2021-05-21 15:56:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:56:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:52,342 INFO L225 Difference]: With dead ends: 6306 [2021-05-21 15:56:52,342 INFO L226 Difference]: Without dead ends: 6036 [2021-05-21 15:56:52,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 814.9ms TimeCoverageRelationStatistics Valid=1303, Invalid=3953, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:56:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-05-21 15:56:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4013. [2021-05-21 15:56:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 4012 states have (on average 2.7612163509471586) internal successors, (11078), 4012 states have internal predecessors, (11078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 11078 transitions. [2021-05-21 15:56:52,383 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 11078 transitions. Word has length 175 [2021-05-21 15:56:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:52,383 INFO L482 AbstractCegarLoop]: Abstraction has 4013 states and 11078 transitions. [2021-05-21 15:56:52,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 11078 transitions. [2021-05-21 15:56:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:52,386 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:52,386 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:52,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-05-21 15:56:52,587 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:52,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1482845970, now seen corresponding path program 406 times [2021-05-21 15:56:52,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:52,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738598801] [2021-05-21 15:56:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:52,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:52,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738598801] [2021-05-21 15:56:52,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738598801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:52,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221461201] [2021-05-21 15:56:52,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:52,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:56:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221461201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:53,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:53,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:56:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079570324] [2021-05-21 15:56:53,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:53,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:53,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:53,111 INFO L87 Difference]: Start difference. First operand 4013 states and 11078 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:53,775 INFO L93 Difference]: Finished difference Result 6331 states and 15917 transitions. [2021-05-21 15:56:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:56:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:53,779 INFO L225 Difference]: With dead ends: 6331 [2021-05-21 15:56:53,779 INFO L226 Difference]: Without dead ends: 6061 [2021-05-21 15:56:53,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 747.7ms TimeCoverageRelationStatistics Valid=1307, Invalid=3949, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:56:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-05-21 15:56:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4088. [2021-05-21 15:56:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.7655982383166138) internal successors, (11303), 4087 states have internal predecessors, (11303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11303 transitions. [2021-05-21 15:56:53,819 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11303 transitions. Word has length 175 [2021-05-21 15:56:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:53,819 INFO L482 AbstractCegarLoop]: Abstraction has 4088 states and 11303 transitions. [2021-05-21 15:56:53,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11303 transitions. [2021-05-21 15:56:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:53,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:53,822 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:54,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-05-21 15:56:54,023 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:54,023 INFO L82 PathProgramCache]: Analyzing trace with hash -16161858, now seen corresponding path program 407 times [2021-05-21 15:56:54,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:54,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626627919] [2021-05-21 15:56:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:54,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626627919] [2021-05-21 15:56:54,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626627919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830124613] [2021-05-21 15:56:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:54,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:56:54,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:54,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:54,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830124613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:54,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:54,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:56:54,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815458522] [2021-05-21 15:56:54,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:56:54,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:56:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:56:54,572 INFO L87 Difference]: Start difference. First operand 4088 states and 11303 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:55,300 INFO L93 Difference]: Finished difference Result 6356 states and 16042 transitions. [2021-05-21 15:56:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:56:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:55,305 INFO L225 Difference]: With dead ends: 6356 [2021-05-21 15:56:55,305 INFO L226 Difference]: Without dead ends: 6086 [2021-05-21 15:56:55,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=1331, Invalid=4219, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:56:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-05-21 15:56:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4163. [2021-05-21 15:56:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4162 states have (on average 2.7698222008649687) internal successors, (11528), 4162 states have internal predecessors, (11528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 11528 transitions. [2021-05-21 15:56:55,347 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 11528 transitions. Word has length 175 [2021-05-21 15:56:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:55,347 INFO L482 AbstractCegarLoop]: Abstraction has 4163 states and 11528 transitions. [2021-05-21 15:56:55,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 11528 transitions. [2021-05-21 15:56:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:55,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:55,350 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:55,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-05-21 15:56:55,562 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:55,563 INFO L82 PathProgramCache]: Analyzing trace with hash -151383252, now seen corresponding path program 408 times [2021-05-21 15:56:55,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:55,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323630281] [2021-05-21 15:56:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:55,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323630281] [2021-05-21 15:56:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323630281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450096497] [2021-05-21 15:56:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:55,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:56:55,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:55,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:55,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450096497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:56,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:56,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:56:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213080775] [2021-05-21 15:56:56,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:56,154 INFO L87 Difference]: Start difference. First operand 4163 states and 11528 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:56,862 INFO L93 Difference]: Finished difference Result 6381 states and 16167 transitions. [2021-05-21 15:56:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:56:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:56,867 INFO L225 Difference]: With dead ends: 6381 [2021-05-21 15:56:56,867 INFO L226 Difference]: Without dead ends: 6111 [2021-05-21 15:56:56,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=1349, Invalid=4201, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:56:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-05-21 15:56:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4238. [2021-05-21 15:56:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 4237 states have (on average 2.773896624970498) internal successors, (11753), 4237 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 11753 transitions. [2021-05-21 15:56:56,911 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 11753 transitions. Word has length 175 [2021-05-21 15:56:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:56,911 INFO L482 AbstractCegarLoop]: Abstraction has 4238 states and 11753 transitions. [2021-05-21 15:56:56,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 11753 transitions. [2021-05-21 15:56:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:56,914 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:56,914 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:57,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-05-21 15:56:57,114 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1028118020, now seen corresponding path program 409 times [2021-05-21 15:56:57,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:57,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854554160] [2021-05-21 15:56:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:57,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854554160] [2021-05-21 15:56:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854554160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623241419] [2021-05-21 15:56:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623241419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:57,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:56:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820198571] [2021-05-21 15:56:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:56:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:56:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:56:57,663 INFO L87 Difference]: Start difference. First operand 4238 states and 11753 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:58,454 INFO L93 Difference]: Finished difference Result 6406 states and 16292 transitions. [2021-05-21 15:56:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:56:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:58,458 INFO L225 Difference]: With dead ends: 6406 [2021-05-21 15:56:58,459 INFO L226 Difference]: Without dead ends: 6136 [2021-05-21 15:56:58,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=1375, Invalid=4477, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:56:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-05-21 15:56:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4313. [2021-05-21 15:56:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4313 states, 4312 states have (on average 2.777829313543599) internal successors, (11978), 4312 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 11978 transitions. [2021-05-21 15:56:58,502 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 11978 transitions. Word has length 175 [2021-05-21 15:56:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:56:58,502 INFO L482 AbstractCegarLoop]: Abstraction has 4313 states and 11978 transitions. [2021-05-21 15:56:58,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 11978 transitions. [2021-05-21 15:56:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:56:58,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:56:58,505 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:56:58,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:58,705 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:56:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:56:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1529522922, now seen corresponding path program 410 times [2021-05-21 15:56:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:56:58,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656644805] [2021-05-21 15:56:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:56:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:56:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:58,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:56:58,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656644805] [2021-05-21 15:56:58,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656644805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:58,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877224345] [2021-05-21 15:56:58,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:56:59,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:56:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:56:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:56:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:56:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:56:59,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877224345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:56:59,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:56:59,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:56:59,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704503734] [2021-05-21 15:56:59,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:56:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:56:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:56:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:56:59,214 INFO L87 Difference]: Start difference. First operand 4313 states and 11978 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:56:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:56:59,969 INFO L93 Difference]: Finished difference Result 6431 states and 16417 transitions. [2021-05-21 15:56:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:56:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:56:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:56:59,975 INFO L225 Difference]: With dead ends: 6431 [2021-05-21 15:56:59,975 INFO L226 Difference]: Without dead ends: 6161 [2021-05-21 15:56:59,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:56:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-05-21 15:57:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4388. [2021-05-21 15:57:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 2.7816275359015274) internal successors, (12203), 4387 states have internal predecessors, (12203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 12203 transitions. [2021-05-21 15:57:00,023 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 12203 transitions. Word has length 175 [2021-05-21 15:57:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:00,023 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 12203 transitions. [2021-05-21 15:57:00,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 12203 transitions. [2021-05-21 15:57:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:00,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:00,026 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:00,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-05-21 15:57:00,227 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:00,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:00,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1400896070, now seen corresponding path program 411 times [2021-05-21 15:57:00,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:00,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118720931] [2021-05-21 15:57:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:00,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118720931] [2021-05-21 15:57:00,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118720931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947105381] [2021-05-21 15:57:00,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:00,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:57:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:00,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947105381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:00,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:00,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668233813] [2021-05-21 15:57:00,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:00,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:00,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:00,798 INFO L87 Difference]: Start difference. First operand 4388 states and 12203 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:01,612 INFO L93 Difference]: Finished difference Result 6456 states and 16542 transitions. [2021-05-21 15:57:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:57:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:01,618 INFO L225 Difference]: With dead ends: 6456 [2021-05-21 15:57:01,618 INFO L226 Difference]: Without dead ends: 6186 [2021-05-21 15:57:01,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=1435, Invalid=4727, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:57:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-05-21 15:57:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4463. [2021-05-21 15:57:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 2.7852980726131777) internal successors, (12428), 4462 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 12428 transitions. [2021-05-21 15:57:01,663 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 12428 transitions. Word has length 175 [2021-05-21 15:57:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:01,663 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 12428 transitions. [2021-05-21 15:57:01,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 12428 transitions. [2021-05-21 15:57:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:01,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:01,666 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:01,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-05-21 15:57:01,866 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:01,867 INFO L82 PathProgramCache]: Analyzing trace with hash 616839208, now seen corresponding path program 412 times [2021-05-21 15:57:01,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:01,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955703342] [2021-05-21 15:57:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:02,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:02,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955703342] [2021-05-21 15:57:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955703342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:02,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145098558] [2021-05-21 15:57:02,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:02,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:57:02,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:02,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:02,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145098558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:02,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:02,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:02,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213428820] [2021-05-21 15:57:02,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:02,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:02,365 INFO L87 Difference]: Start difference. First operand 4463 states and 12428 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:03,133 INFO L93 Difference]: Finished difference Result 6481 states and 16667 transitions. [2021-05-21 15:57:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:57:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:03,138 INFO L225 Difference]: With dead ends: 6481 [2021-05-21 15:57:03,138 INFO L226 Difference]: Without dead ends: 6211 [2021-05-21 15:57:03,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=1481, Invalid=4681, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:57:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-05-21 15:57:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4538. [2021-05-21 15:57:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4537 states have (on average 2.7888472558959667) internal successors, (12653), 4537 states have internal predecessors, (12653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 12653 transitions. [2021-05-21 15:57:03,184 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 12653 transitions. Word has length 175 [2021-05-21 15:57:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:03,185 INFO L482 AbstractCegarLoop]: Abstraction has 4538 states and 12653 transitions. [2021-05-21 15:57:03,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 12653 transitions. [2021-05-21 15:57:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:03,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:03,188 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:03,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-05-21 15:57:03,389 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:03,389 INFO L82 PathProgramCache]: Analyzing trace with hash -281684232, now seen corresponding path program 413 times [2021-05-21 15:57:03,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:03,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391474821] [2021-05-21 15:57:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:03,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:03,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391474821] [2021-05-21 15:57:03,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391474821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:03,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11657456] [2021-05-21 15:57:03,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:03,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:57:03,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:03,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11657456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:03,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:03,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:03,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678887330] [2021-05-21 15:57:03,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:03,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:03,939 INFO L87 Difference]: Start difference. First operand 4538 states and 12653 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:04,887 INFO L93 Difference]: Finished difference Result 6506 states and 16792 transitions. [2021-05-21 15:57:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:57:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:04,893 INFO L225 Difference]: With dead ends: 6506 [2021-05-21 15:57:04,893 INFO L226 Difference]: Without dead ends: 6236 [2021-05-21 15:57:04,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 930.3ms TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:57:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-05-21 15:57:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 4613. [2021-05-21 15:57:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.7922810060711187) internal successors, (12878), 4612 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 12878 transitions. [2021-05-21 15:57:04,941 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 12878 transitions. Word has length 175 [2021-05-21 15:57:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:04,941 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 12878 transitions. [2021-05-21 15:57:04,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 12878 transitions. [2021-05-21 15:57:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:04,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:04,944 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:05,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-05-21 15:57:05,145 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1896637722, now seen corresponding path program 414 times [2021-05-21 15:57:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:05,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945903503] [2021-05-21 15:57:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:05,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945903503] [2021-05-21 15:57:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945903503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777681088] [2021-05-21 15:57:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:05,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:57:05,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:05,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:05,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777681088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:05,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:05,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:05,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588405863] [2021-05-21 15:57:05,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:05,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:05,688 INFO L87 Difference]: Start difference. First operand 4613 states and 12878 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:06,459 INFO L93 Difference]: Finished difference Result 6531 states and 16917 transitions. [2021-05-21 15:57:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:57:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:06,465 INFO L225 Difference]: With dead ends: 6531 [2021-05-21 15:57:06,465 INFO L226 Difference]: Without dead ends: 6261 [2021-05-21 15:57:06,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=4909, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:57:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-05-21 15:57:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 4688. [2021-05-21 15:57:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 2.795604864518882) internal successors, (13103), 4687 states have internal predecessors, (13103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 13103 transitions. [2021-05-21 15:57:06,513 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 13103 transitions. Word has length 175 [2021-05-21 15:57:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:06,514 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 13103 transitions. [2021-05-21 15:57:06,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 13103 transitions. [2021-05-21 15:57:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:06,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:06,517 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:06,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:06,718 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2017885622, now seen corresponding path program 415 times [2021-05-21 15:57:06,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:06,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153294839] [2021-05-21 15:57:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:07,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:07,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153294839] [2021-05-21 15:57:07,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153294839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:07,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541795588] [2021-05-21 15:57:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541795588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:07,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:07,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:07,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908877681] [2021-05-21 15:57:07,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:07,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:07,244 INFO L87 Difference]: Start difference. First operand 4688 states and 13103 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:08,220 INFO L93 Difference]: Finished difference Result 6556 states and 17042 transitions. [2021-05-21 15:57:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:57:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:08,226 INFO L225 Difference]: With dead ends: 6556 [2021-05-21 15:57:08,226 INFO L226 Difference]: Without dead ends: 6286 [2021-05-21 15:57:08,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1005.2ms TimeCoverageRelationStatistics Valid=1603, Invalid=5203, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:57:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-05-21 15:57:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 4763. [2021-05-21 15:57:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 2.7988240235195296) internal successors, (13328), 4762 states have internal predecessors, (13328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 13328 transitions. [2021-05-21 15:57:08,273 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 13328 transitions. Word has length 175 [2021-05-21 15:57:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:08,273 INFO L482 AbstractCegarLoop]: Abstraction has 4763 states and 13328 transitions. [2021-05-21 15:57:08,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 13328 transitions. [2021-05-21 15:57:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:08,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:08,277 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:08,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-05-21 15:57:08,477 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1652706524, now seen corresponding path program 416 times [2021-05-21 15:57:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:08,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160609079] [2021-05-21 15:57:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:08,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160609079] [2021-05-21 15:57:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160609079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253015494] [2021-05-21 15:57:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:08,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:57:08,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:08,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:08,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253015494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:08,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:08,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075722971] [2021-05-21 15:57:08,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:08,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:08,962 INFO L87 Difference]: Start difference. First operand 4763 states and 13328 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:09,812 INFO L93 Difference]: Finished difference Result 6581 states and 17167 transitions. [2021-05-21 15:57:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:57:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:09,817 INFO L225 Difference]: With dead ends: 6581 [2021-05-21 15:57:09,817 INFO L226 Difference]: Without dead ends: 6311 [2021-05-21 15:57:09,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=1677, Invalid=5129, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:57:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-05-21 15:57:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 4838. [2021-05-21 15:57:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8019433533181726) internal successors, (13553), 4837 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13553 transitions. [2021-05-21 15:57:09,865 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13553 transitions. Word has length 175 [2021-05-21 15:57:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:09,865 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13553 transitions. [2021-05-21 15:57:09,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13553 transitions. [2021-05-21 15:57:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:09,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:09,868 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:10,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:10,069 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -843654668, now seen corresponding path program 417 times [2021-05-21 15:57:10,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:10,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603573513] [2021-05-21 15:57:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:10,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:10,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603573513] [2021-05-21 15:57:10,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603573513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:10,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851300785] [2021-05-21 15:57:10,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:10,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:57:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:10,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851300785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:10,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:10,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:10,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347026427] [2021-05-21 15:57:10,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:10,583 INFO L87 Difference]: Start difference. First operand 4838 states and 13553 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:11,572 INFO L93 Difference]: Finished difference Result 6606 states and 17292 transitions. [2021-05-21 15:57:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:57:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:11,577 INFO L225 Difference]: With dead ends: 6606 [2021-05-21 15:57:11,578 INFO L226 Difference]: Without dead ends: 6336 [2021-05-21 15:57:11,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 998.3ms TimeCoverageRelationStatistics Valid=1711, Invalid=5429, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:57:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-05-21 15:57:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 4913. [2021-05-21 15:57:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.804967426710098) internal successors, (13778), 4912 states have internal predecessors, (13778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13778 transitions. [2021-05-21 15:57:11,626 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13778 transitions. Word has length 175 [2021-05-21 15:57:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:11,627 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13778 transitions. [2021-05-21 15:57:11,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13778 transitions. [2021-05-21 15:57:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:11,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:11,630 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:11,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-05-21 15:57:11,831 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2059362530, now seen corresponding path program 418 times [2021-05-21 15:57:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:11,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990984319] [2021-05-21 15:57:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:12,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990984319] [2021-05-21 15:57:12,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990984319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738684540] [2021-05-21 15:57:12,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:12,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:57:12,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:12,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738684540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:12,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:12,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:12,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73070879] [2021-05-21 15:57:12,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:12,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:12,336 INFO L87 Difference]: Start difference. First operand 4913 states and 13778 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:13,180 INFO L93 Difference]: Finished difference Result 6631 states and 17417 transitions. [2021-05-21 15:57:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:57:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:13,186 INFO L225 Difference]: With dead ends: 6631 [2021-05-21 15:57:13,186 INFO L226 Difference]: Without dead ends: 6361 [2021-05-21 15:57:13,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 887.9ms TimeCoverageRelationStatistics Valid=1799, Invalid=5341, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:57:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-05-21 15:57:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 4988. [2021-05-21 15:57:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 2.80790054140766) internal successors, (14003), 4987 states have internal predecessors, (14003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 14003 transitions. [2021-05-21 15:57:13,236 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 14003 transitions. Word has length 175 [2021-05-21 15:57:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:13,236 INFO L482 AbstractCegarLoop]: Abstraction has 4988 states and 14003 transitions. [2021-05-21 15:57:13,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 14003 transitions. [2021-05-21 15:57:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:13,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:13,240 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:13,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:13,441 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1814285234, now seen corresponding path program 419 times [2021-05-21 15:57:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:13,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218443323] [2021-05-21 15:57:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:13,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:13,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218443323] [2021-05-21 15:57:13,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218443323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:13,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819112869] [2021-05-21 15:57:13,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:13,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:57:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:13,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819112869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:13,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:13,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:13,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544515690] [2021-05-21 15:57:13,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:13,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:13,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:13,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:13,942 INFO L87 Difference]: Start difference. First operand 4988 states and 14003 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:14,998 INFO L93 Difference]: Finished difference Result 6656 states and 17542 transitions. [2021-05-21 15:57:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:57:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:15,004 INFO L225 Difference]: With dead ends: 6656 [2021-05-21 15:57:15,004 INFO L226 Difference]: Without dead ends: 6386 [2021-05-21 15:57:15,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1053.0ms TimeCoverageRelationStatistics Valid=1835, Invalid=5647, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:57:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-05-21 15:57:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5063. [2021-05-21 15:57:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 2.8107467404188067) internal successors, (14228), 5062 states have internal predecessors, (14228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 14228 transitions. [2021-05-21 15:57:15,057 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 14228 transitions. Word has length 175 [2021-05-21 15:57:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:15,058 INFO L482 AbstractCegarLoop]: Abstraction has 5063 states and 14228 transitions. [2021-05-21 15:57:15,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 14228 transitions. [2021-05-21 15:57:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:15,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:15,062 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:15,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:15,262 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:15,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1437434912, now seen corresponding path program 420 times [2021-05-21 15:57:15,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:15,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352140046] [2021-05-21 15:57:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:15,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:15,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352140046] [2021-05-21 15:57:15,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352140046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:15,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709388025] [2021-05-21 15:57:15,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:15,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:57:15,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:15,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709388025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:15,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:15,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421811946] [2021-05-21 15:57:15,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:15,749 INFO L87 Difference]: Start difference. First operand 5063 states and 14228 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:16,689 INFO L93 Difference]: Finished difference Result 6681 states and 17667 transitions. [2021-05-21 15:57:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:57:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:16,694 INFO L225 Difference]: With dead ends: 6681 [2021-05-21 15:57:16,694 INFO L226 Difference]: Without dead ends: 6411 [2021-05-21 15:57:16,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 938.1ms TimeCoverageRelationStatistics Valid=1937, Invalid=5545, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:57:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-05-21 15:57:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5138. [2021-05-21 15:57:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5138 states, 5137 states have (on average 2.813509830640452) internal successors, (14453), 5137 states have internal predecessors, (14453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 14453 transitions. [2021-05-21 15:57:16,742 INFO L78 Accepts]: Start accepts. Automaton has 5138 states and 14453 transitions. Word has length 175 [2021-05-21 15:57:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:16,743 INFO L482 AbstractCegarLoop]: Abstraction has 5138 states and 14453 transitions. [2021-05-21 15:57:16,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5138 states and 14453 transitions. [2021-05-21 15:57:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:16,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:16,746 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:16,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:16,947 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1530776848, now seen corresponding path program 421 times [2021-05-21 15:57:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:16,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291461873] [2021-05-21 15:57:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:17,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:17,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291461873] [2021-05-21 15:57:17,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291461873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:17,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970405652] [2021-05-21 15:57:17,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:17,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:17,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:17,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970405652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:17,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:17,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:17,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421891754] [2021-05-21 15:57:17,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:17,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:17,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:17,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:17,447 INFO L87 Difference]: Start difference. First operand 5138 states and 14453 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:18,573 INFO L93 Difference]: Finished difference Result 6706 states and 17792 transitions. [2021-05-21 15:57:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:57:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:18,579 INFO L225 Difference]: With dead ends: 6706 [2021-05-21 15:57:18,579 INFO L226 Difference]: Without dead ends: 6436 [2021-05-21 15:57:18,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 1102.7ms TimeCoverageRelationStatistics Valid=1975, Invalid=5857, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:57:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2021-05-21 15:57:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 5213. [2021-05-21 15:57:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 2.816193399846508) internal successors, (14678), 5212 states have internal predecessors, (14678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 14678 transitions. [2021-05-21 15:57:18,632 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 14678 transitions. Word has length 175 [2021-05-21 15:57:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:18,632 INFO L482 AbstractCegarLoop]: Abstraction has 5213 states and 14678 transitions. [2021-05-21 15:57:18,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 14678 transitions. [2021-05-21 15:57:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:18,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:18,636 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:18,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:18,836 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:18,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1076560674, now seen corresponding path program 422 times [2021-05-21 15:57:18,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:18,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290121129] [2021-05-21 15:57:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:19,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:19,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290121129] [2021-05-21 15:57:19,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290121129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:19,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019509470] [2021-05-21 15:57:19,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:19,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:57:19,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:19,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019509470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:19,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:19,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:19,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448066560] [2021-05-21 15:57:19,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:19,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:19,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:19,328 INFO L87 Difference]: Start difference. First operand 5213 states and 14678 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:20,255 INFO L93 Difference]: Finished difference Result 6731 states and 17917 transitions. [2021-05-21 15:57:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:57:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:20,262 INFO L225 Difference]: With dead ends: 6731 [2021-05-21 15:57:20,262 INFO L226 Difference]: Without dead ends: 6461 [2021-05-21 15:57:20,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 936.3ms TimeCoverageRelationStatistics Valid=2091, Invalid=5741, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:57:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-05-21 15:57:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 5288. [2021-05-21 15:57:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 2.818800832229998) internal successors, (14903), 5287 states have internal predecessors, (14903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 14903 transitions. [2021-05-21 15:57:20,318 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 14903 transitions. Word has length 175 [2021-05-21 15:57:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:20,319 INFO L482 AbstractCegarLoop]: Abstraction has 5288 states and 14903 transitions. [2021-05-21 15:57:20,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 14903 transitions. [2021-05-21 15:57:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:20,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:20,323 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:20,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:20,523 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash -77664338, now seen corresponding path program 423 times [2021-05-21 15:57:20,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:20,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857039653] [2021-05-21 15:57:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:20,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857039653] [2021-05-21 15:57:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857039653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:20,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104461563] [2021-05-21 15:57:20,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:20,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:57:20,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:20,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:21,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104461563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:21,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:21,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970122606] [2021-05-21 15:57:21,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:21,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:21,038 INFO L87 Difference]: Start difference. First operand 5288 states and 14903 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:22,211 INFO L93 Difference]: Finished difference Result 6756 states and 18042 transitions. [2021-05-21 15:57:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 15:57:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:22,218 INFO L225 Difference]: With dead ends: 6756 [2021-05-21 15:57:22,218 INFO L226 Difference]: Without dead ends: 6486 [2021-05-21 15:57:22,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 1159.7ms TimeCoverageRelationStatistics Valid=2131, Invalid=6059, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 15:57:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6486 states. [2021-05-21 15:57:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6486 to 5363. [2021-05-21 15:57:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 2.8213353226408056) internal successors, (15128), 5362 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 15128 transitions. [2021-05-21 15:57:22,274 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 15128 transitions. Word has length 175 [2021-05-21 15:57:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:22,274 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 15128 transitions. [2021-05-21 15:57:22,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 15128 transitions. [2021-05-21 15:57:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:22,278 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:22,278 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:22,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-05-21 15:57:22,479 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1956992228, now seen corresponding path program 424 times [2021-05-21 15:57:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:22,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014576010] [2021-05-21 15:57:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:22,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:22,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014576010] [2021-05-21 15:57:22,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014576010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:22,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457665229] [2021-05-21 15:57:22,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:22,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:57:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:22,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457665229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:22,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:22,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795727624] [2021-05-21 15:57:22,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:22,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:22,979 INFO L87 Difference]: Start difference. First operand 5363 states and 15128 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:23,998 INFO L93 Difference]: Finished difference Result 6781 states and 18167 transitions. [2021-05-21 15:57:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 15:57:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:24,005 INFO L225 Difference]: With dead ends: 6781 [2021-05-21 15:57:24,005 INFO L226 Difference]: Without dead ends: 6511 [2021-05-21 15:57:24,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1014.5ms TimeCoverageRelationStatistics Valid=2261, Invalid=5929, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 15:57:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6511 states. [2021-05-21 15:57:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6511 to 5438. [2021-05-21 15:57:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5438 states, 5437 states have (on average 2.823799889645025) internal successors, (15353), 5437 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 15353 transitions. [2021-05-21 15:57:24,069 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 15353 transitions. Word has length 175 [2021-05-21 15:57:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:24,069 INFO L482 AbstractCegarLoop]: Abstraction has 5438 states and 15353 transitions. [2021-05-21 15:57:24,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 15353 transitions. [2021-05-21 15:57:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:24,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:24,073 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:24,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-05-21 15:57:24,285 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:24,285 INFO L82 PathProgramCache]: Analyzing trace with hash 73327084, now seen corresponding path program 425 times [2021-05-21 15:57:24,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:24,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500512440] [2021-05-21 15:57:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:24,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500512440] [2021-05-21 15:57:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500512440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:24,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104719032] [2021-05-21 15:57:24,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:24,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-21 15:57:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:24,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104719032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:24,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:24,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043364921] [2021-05-21 15:57:24,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:24,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:24,839 INFO L87 Difference]: Start difference. First operand 5438 states and 15353 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:26,159 INFO L93 Difference]: Finished difference Result 6806 states and 18292 transitions. [2021-05-21 15:57:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 15:57:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:26,164 INFO L225 Difference]: With dead ends: 6806 [2021-05-21 15:57:26,164 INFO L226 Difference]: Without dead ends: 6536 [2021-05-21 15:57:26,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1304.3ms TimeCoverageRelationStatistics Valid=2303, Invalid=6253, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 15:57:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6536 states. [2021-05-21 15:57:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6536 to 5513. [2021-05-21 15:57:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 2.826197387518142) internal successors, (15578), 5512 states have internal predecessors, (15578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 15578 transitions. [2021-05-21 15:57:26,226 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 15578 transitions. Word has length 175 [2021-05-21 15:57:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:26,226 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 15578 transitions. [2021-05-21 15:57:26,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 15578 transitions. [2021-05-21 15:57:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:26,230 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:26,230 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:26,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-21 15:57:26,431 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 687566554, now seen corresponding path program 426 times [2021-05-21 15:57:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:26,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410516079] [2021-05-21 15:57:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:26,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:26,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410516079] [2021-05-21 15:57:26,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410516079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:26,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896860541] [2021-05-21 15:57:26,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:26,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-21 15:57:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:26,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896860541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:26,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:26,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:26,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925167946] [2021-05-21 15:57:26,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:26,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:26,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:26,921 INFO L87 Difference]: Start difference. First operand 5513 states and 15578 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:27,962 INFO L93 Difference]: Finished difference Result 6831 states and 18417 transitions. [2021-05-21 15:57:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 15:57:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:27,969 INFO L225 Difference]: With dead ends: 6831 [2021-05-21 15:57:27,969 INFO L226 Difference]: Without dead ends: 6561 [2021-05-21 15:57:27,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=2447, Invalid=6109, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 15:57:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-05-21 15:57:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5588. [2021-05-21 15:57:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5587 states have (on average 2.828530517272239) internal successors, (15803), 5587 states have internal predecessors, (15803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 15803 transitions. [2021-05-21 15:57:28,034 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 15803 transitions. Word has length 175 [2021-05-21 15:57:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:28,034 INFO L482 AbstractCegarLoop]: Abstraction has 5588 states and 15803 transitions. [2021-05-21 15:57:28,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 15803 transitions. [2021-05-21 15:57:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:28,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:28,039 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:28,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:28,239 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1027675734, now seen corresponding path program 427 times [2021-05-21 15:57:28,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:28,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529497156] [2021-05-21 15:57:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:28,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:28,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529497156] [2021-05-21 15:57:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529497156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552199706] [2021-05-21 15:57:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:28,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552199706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:28,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:28,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-05-21 15:57:28,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017493000] [2021-05-21 15:57:28,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:28,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:28,762 INFO L87 Difference]: Start difference. First operand 5588 states and 15803 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:29,980 INFO L93 Difference]: Finished difference Result 6916 states and 18707 transitions. [2021-05-21 15:57:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 15:57:29,980 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:29,987 INFO L225 Difference]: With dead ends: 6916 [2021-05-21 15:57:29,987 INFO L226 Difference]: Without dead ends: 6646 [2021-05-21 15:57:29,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=2491, Invalid=6439, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 15:57:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-05-21 15:57:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 5663. [2021-05-21 15:57:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5663 states, 5662 states have (on average 2.834334157541505) internal successors, (16048), 5662 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5663 states to 5663 states and 16048 transitions. [2021-05-21 15:57:30,044 INFO L78 Accepts]: Start accepts. Automaton has 5663 states and 16048 transitions. Word has length 175 [2021-05-21 15:57:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:30,044 INFO L482 AbstractCegarLoop]: Abstraction has 5663 states and 16048 transitions. [2021-05-21 15:57:30,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5663 states and 16048 transitions. [2021-05-21 15:57:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:30,048 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:30,048 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:30,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-05-21 15:57:30,249 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2060323336, now seen corresponding path program 428 times [2021-05-21 15:57:30,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:30,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146302791] [2021-05-21 15:57:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:30,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:30,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146302791] [2021-05-21 15:57:30,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146302791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:30,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503759508] [2021-05-21 15:57:30,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:30,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:57:30,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:30,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503759508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:30,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:30,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-05-21 15:57:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330999133] [2021-05-21 15:57:30,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 15:57:30,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 15:57:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:57:30,741 INFO L87 Difference]: Start difference. First operand 5663 states and 16048 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:31,764 INFO L93 Difference]: Finished difference Result 7658 states and 20831 transitions. [2021-05-21 15:57:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 15:57:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:31,771 INFO L225 Difference]: With dead ends: 7658 [2021-05-21 15:57:31,771 INFO L226 Difference]: Without dead ends: 7388 [2021-05-21 15:57:31,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 1008.0ms TimeCoverageRelationStatistics Valid=2650, Invalid=6280, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 15:57:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-05-21 15:57:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 5843. [2021-05-21 15:57:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 5842 states have (on average 2.842690859294762) internal successors, (16607), 5842 states have internal predecessors, (16607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 16607 transitions. [2021-05-21 15:57:31,831 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 16607 transitions. Word has length 175 [2021-05-21 15:57:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:31,831 INFO L482 AbstractCegarLoop]: Abstraction has 5843 states and 16607 transitions. [2021-05-21 15:57:31,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 16607 transitions. [2021-05-21 15:57:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-21 15:57:31,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:31,835 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:32,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-05-21 15:57:32,035 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2037980086, now seen corresponding path program 429 times [2021-05-21 15:57:32,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:32,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247141070] [2021-05-21 15:57:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247141070] [2021-05-21 15:57:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247141070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468940447] [2021-05-21 15:57:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:32,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-21 15:57:32,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-21 15:57:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:32,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468940447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:32,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:32,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-05-21 15:57:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649558045] [2021-05-21 15:57:32,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:32,548 INFO L87 Difference]: Start difference. First operand 5843 states and 16607 transitions. Second operand has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:33,887 INFO L93 Difference]: Finished difference Result 7526 states and 20496 transitions. [2021-05-21 15:57:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 15:57:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-05-21 15:57:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:33,894 INFO L225 Difference]: With dead ends: 7526 [2021-05-21 15:57:33,894 INFO L226 Difference]: Without dead ends: 6951 [2021-05-21 15:57:33,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 1311.1ms TimeCoverageRelationStatistics Valid=2786, Invalid=7314, Unknown=0, NotChecked=0, Total=10100 [2021-05-21 15:57:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-05-21 15:57:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5878. [2021-05-21 15:57:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8386932108218477) internal successors, (16683), 5877 states have internal predecessors, (16683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-05-21 15:57:33,956 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-05-21 15:57:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:33,956 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-05-21 15:57:33,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-05-21 15:57:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:33,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:33,960 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:34,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-05-21 15:57:34,161 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1789996418, now seen corresponding path program 430 times [2021-05-21 15:57:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:34,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094366521] [2021-05-21 15:57:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:34,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:34,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094366521] [2021-05-21 15:57:34,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094366521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:34,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688133312] [2021-05-21 15:57:34,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:34,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:57:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:34,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:57:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:34,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688133312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:34,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:34,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-05-21 15:57:34,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408136172] [2021-05-21 15:57:34,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:57:34,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:34,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:57:34,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:57:34,761 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:35,443 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-05-21 15:57:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:57:35,444 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:35,451 INFO L225 Difference]: With dead ends: 7268 [2021-05-21 15:57:35,451 INFO L226 Difference]: Without dead ends: 6934 [2021-05-21 15:57:35,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=1485, Invalid=3917, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:57:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-05-21 15:57:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-05-21 15:57:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 2.8267359946326738) internal successors, (16853), 5962 states have internal predecessors, (16853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-05-21 15:57:35,511 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-05-21 15:57:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:35,512 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-05-21 15:57:35,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-05-21 15:57:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:35,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:35,516 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:35,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:35,717 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 308357446, now seen corresponding path program 431 times [2021-05-21 15:57:35,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:35,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118754853] [2021-05-21 15:57:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:36,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:36,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118754853] [2021-05-21 15:57:36,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118754853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:36,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929300213] [2021-05-21 15:57:36,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:36,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:57:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:36,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929300213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:36,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:36,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711297095] [2021-05-21 15:57:36,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:36,300 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:36,878 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-05-21 15:57:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:57:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:36,887 INFO L225 Difference]: With dead ends: 8561 [2021-05-21 15:57:36,887 INFO L226 Difference]: Without dead ends: 8291 [2021-05-21 15:57:36,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=1286, Invalid=3270, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 15:57:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-05-21 15:57:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-05-21 15:57:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:36,956 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:36,956 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:36,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:36,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:36,961 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:37,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-05-21 15:57:37,161 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash -839634922, now seen corresponding path program 432 times [2021-05-21 15:57:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:37,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096661142] [2021-05-21 15:57:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:37,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:37,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096661142] [2021-05-21 15:57:37,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096661142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:37,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046419052] [2021-05-21 15:57:37,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:37,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:57:37,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046419052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:37,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:37,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:37,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450121145] [2021-05-21 15:57:37,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:37,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:37,809 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:38,456 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-05-21 15:57:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:57:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:38,465 INFO L225 Difference]: With dead ends: 8446 [2021-05-21 15:57:38,465 INFO L226 Difference]: Without dead ends: 8176 [2021-05-21 15:57:38,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=1373, Invalid=3739, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:57:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-05-21 15:57:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-05-21 15:57:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:38,532 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:38,533 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:38,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:38,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:38,537 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:38,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:38,737 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1590602500, now seen corresponding path program 433 times [2021-05-21 15:57:38,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:38,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674518744] [2021-05-21 15:57:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:39,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:39,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674518744] [2021-05-21 15:57:39,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674518744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:39,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405222496] [2021-05-21 15:57:39,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:39,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405222496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:39,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:39,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:39,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766916938] [2021-05-21 15:57:39,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:39,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:39,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:39,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:39,296 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:39,906 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-05-21 15:57:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:57:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:39,913 INFO L225 Difference]: With dead ends: 8421 [2021-05-21 15:57:39,913 INFO L226 Difference]: Without dead ends: 8151 [2021-05-21 15:57:39,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=1281, Invalid=3549, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 15:57:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-05-21 15:57:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-05-21 15:57:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:39,973 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:39,973 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:39,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:39,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:39,977 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:40,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-21 15:57:40,177 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:40,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2006649388, now seen corresponding path program 434 times [2021-05-21 15:57:40,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:40,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735951580] [2021-05-21 15:57:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:40,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:40,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735951580] [2021-05-21 15:57:40,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735951580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:40,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406174566] [2021-05-21 15:57:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:40,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:57:40,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:40,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:40,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:40,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406174566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:40,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:40,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:40,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518932620] [2021-05-21 15:57:40,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:40,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:40,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:40,764 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:41,466 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-05-21 15:57:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:57:41,466 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:41,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:41,474 INFO L225 Difference]: With dead ends: 8371 [2021-05-21 15:57:41,474 INFO L226 Difference]: Without dead ends: 8101 [2021-05-21 15:57:41,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 830.4ms TimeCoverageRelationStatistics Valid=1376, Invalid=4026, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:57:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-05-21 15:57:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-05-21 15:57:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:41,532 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:41,532 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:41,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:41,536 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:41,536 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:41,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-05-21 15:57:41,736 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash 568435266, now seen corresponding path program 435 times [2021-05-21 15:57:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:41,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786705983] [2021-05-21 15:57:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:42,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:42,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786705983] [2021-05-21 15:57:42,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786705983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:42,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656936617] [2021-05-21 15:57:42,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:42,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:57:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:42,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656936617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:42,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:42,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:42,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875388475] [2021-05-21 15:57:42,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:42,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:42,326 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:43,091 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-05-21 15:57:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:57:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:43,100 INFO L225 Difference]: With dead ends: 8321 [2021-05-21 15:57:43,100 INFO L226 Difference]: Without dead ends: 8051 [2021-05-21 15:57:43,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=1292, Invalid=3820, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:57:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-05-21 15:57:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-05-21 15:57:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:43,160 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:43,161 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:43,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:43,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:43,165 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:43,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-05-21 15:57:43,373 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash 67121426, now seen corresponding path program 436 times [2021-05-21 15:57:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:43,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80144616] [2021-05-21 15:57:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:43,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80144616] [2021-05-21 15:57:43,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80144616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13302142] [2021-05-21 15:57:43,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:43,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:57:43,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:44,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13302142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:44,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:44,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:44,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044620815] [2021-05-21 15:57:44,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:44,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:44,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:44,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:44,056 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:44,927 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-05-21 15:57:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:57:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:44,936 INFO L225 Difference]: With dead ends: 8271 [2021-05-21 15:57:44,936 INFO L226 Difference]: Without dead ends: 8001 [2021-05-21 15:57:44,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 964.2ms TimeCoverageRelationStatistics Valid=1395, Invalid=4305, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:57:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-05-21 15:57:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-05-21 15:57:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:44,997 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:44,997 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:44,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:45,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:45,002 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:45,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-05-21 15:57:45,202 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:45,202 INFO L82 PathProgramCache]: Analyzing trace with hash 543616768, now seen corresponding path program 437 times [2021-05-21 15:57:45,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:45,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395270] [2021-05-21 15:57:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:45,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395270] [2021-05-21 15:57:45,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892223134] [2021-05-21 15:57:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:45,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:57:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:45,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892223134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:45,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:45,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:45,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530381447] [2021-05-21 15:57:45,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:45,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:45,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:45,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:45,823 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:46,729 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-05-21 15:57:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:57:46,729 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:46,736 INFO L225 Difference]: With dead ends: 8221 [2021-05-21 15:57:46,736 INFO L226 Difference]: Without dead ends: 7951 [2021-05-21 15:57:46,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 964.3ms TimeCoverageRelationStatistics Valid=1319, Invalid=4083, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 15:57:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-05-21 15:57:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-05-21 15:57:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:46,789 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:46,789 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:46,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:46,793 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:46,794 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:47,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-05-21 15:57:47,006 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2010300880, now seen corresponding path program 438 times [2021-05-21 15:57:47,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:47,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504453397] [2021-05-21 15:57:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:47,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:47,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504453397] [2021-05-21 15:57:47,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504453397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:47,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499948127] [2021-05-21 15:57:47,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:47,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:57:47,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:47,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499948127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:47,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:47,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:47,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334105517] [2021-05-21 15:57:47,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:47,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:47,588 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:48,397 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-05-21 15:57:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:57:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:48,405 INFO L225 Difference]: With dead ends: 8171 [2021-05-21 15:57:48,405 INFO L226 Difference]: Without dead ends: 7901 [2021-05-21 15:57:48,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 911.2ms TimeCoverageRelationStatistics Valid=1430, Invalid=4576, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:57:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-05-21 15:57:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-05-21 15:57:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:48,469 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:48,469 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:48,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:48,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:48,473 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:48,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:48,674 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1875079486, now seen corresponding path program 439 times [2021-05-21 15:57:48,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:48,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539614744] [2021-05-21 15:57:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:49,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:49,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539614744] [2021-05-21 15:57:49,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539614744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:49,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169702083] [2021-05-21 15:57:49,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:49,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169702083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:49,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:49,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:49,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679112440] [2021-05-21 15:57:49,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:49,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:49,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:49,235 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:50,005 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-05-21 15:57:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:57:50,005 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:50,013 INFO L225 Difference]: With dead ends: 8121 [2021-05-21 15:57:50,013 INFO L226 Difference]: Without dead ends: 7851 [2021-05-21 15:57:50,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 827.5ms TimeCoverageRelationStatistics Valid=1362, Invalid=4338, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 15:57:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-05-21 15:57:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-05-21 15:57:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:50,071 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:50,072 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:50,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:50,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:50,076 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:50,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-05-21 15:57:50,276 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash 998344718, now seen corresponding path program 440 times [2021-05-21 15:57:50,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:50,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082925788] [2021-05-21 15:57:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:50,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082925788] [2021-05-21 15:57:50,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082925788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090291503] [2021-05-21 15:57:50,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:50,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:57:50,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090291503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:50,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:50,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145943699] [2021-05-21 15:57:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:50,863 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:51,773 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-05-21 15:57:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:57:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:51,781 INFO L225 Difference]: With dead ends: 8071 [2021-05-21 15:57:51,781 INFO L226 Difference]: Without dead ends: 7801 [2021-05-21 15:57:51,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 938.6ms TimeCoverageRelationStatistics Valid=1481, Invalid=4839, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:57:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-05-21 15:57:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-05-21 15:57:51,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:51,843 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:51,843 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:51,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:51,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:51,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:51,848 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:52,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-21 15:57:52,048 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:52,048 INFO L82 PathProgramCache]: Analyzing trace with hash -738981636, now seen corresponding path program 441 times [2021-05-21 15:57:52,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:52,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756099133] [2021-05-21 15:57:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:52,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:52,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756099133] [2021-05-21 15:57:52,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756099133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:52,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315095929] [2021-05-21 15:57:52,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:52,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:57:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315095929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521243692] [2021-05-21 15:57:52,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:52,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:52,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:52,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:52,590 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:53,377 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-05-21 15:57:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:57:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:53,383 INFO L225 Difference]: With dead ends: 8021 [2021-05-21 15:57:53,383 INFO L226 Difference]: Without dead ends: 7751 [2021-05-21 15:57:53,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 15:57:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-05-21 15:57:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-05-21 15:57:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:53,437 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:53,437 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:53,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:53,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:53,441 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:53,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-05-21 15:57:53,642 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash 625566668, now seen corresponding path program 442 times [2021-05-21 15:57:53,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:53,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74239285] [2021-05-21 15:57:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:53,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74239285] [2021-05-21 15:57:53,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74239285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621677175] [2021-05-21 15:57:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:54,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:57:54,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621677175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:54,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:54,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:54,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752163876] [2021-05-21 15:57:54,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:54,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:54,194 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:55,113 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-05-21 15:57:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:57:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:55,121 INFO L225 Difference]: With dead ends: 7971 [2021-05-21 15:57:55,121 INFO L226 Difference]: Without dead ends: 7701 [2021-05-21 15:57:55,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 982.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=5094, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:57:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-05-21 15:57:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-05-21 15:57:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:55,182 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:55,183 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:55,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:55,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:55,187 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:55,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:55,387 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:55,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1651665350, now seen corresponding path program 443 times [2021-05-21 15:57:55,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:55,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073352919] [2021-05-21 15:57:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:55,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073352919] [2021-05-21 15:57:55,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073352919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22446852] [2021-05-21 15:57:55,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:55,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:57:55,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:55,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22446852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:55,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:55,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:55,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167008073] [2021-05-21 15:57:55,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:55,931 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:56,772 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-05-21 15:57:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:57:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:56,780 INFO L225 Difference]: With dead ends: 7921 [2021-05-21 15:57:56,780 INFO L226 Difference]: Without dead ends: 7651 [2021-05-21 15:57:56,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=1496, Invalid=4824, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 15:57:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-05-21 15:57:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-05-21 15:57:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:56,841 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:56,841 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:56,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:56,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:56,846 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:57,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:57,058 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:57,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1744778506, now seen corresponding path program 444 times [2021-05-21 15:57:57,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:57,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562742105] [2021-05-21 15:57:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:57,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562742105] [2021-05-21 15:57:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562742105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294943510] [2021-05-21 15:57:57,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:57,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:57:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:57:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:57,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294943510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:57,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:57,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:57:57,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57522189] [2021-05-21 15:57:57,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:57:57,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:57:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:57:57,636 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:57:58,616 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-05-21 15:57:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:57:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:57:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:57:58,624 INFO L225 Difference]: With dead ends: 7871 [2021-05-21 15:57:58,624 INFO L226 Difference]: Without dead ends: 7601 [2021-05-21 15:57:58,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1042.9ms TimeCoverageRelationStatistics Valid=1631, Invalid=5341, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 15:57:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-05-21 15:57:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-05-21 15:57:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:57:58,685 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:57:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:57:58,685 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:57:58,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:57:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:57:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:57:58,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:57:58,689 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:57:58,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-05-21 15:57:58,890 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:57:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:57:58,890 INFO L82 PathProgramCache]: Analyzing trace with hash 129825016, now seen corresponding path program 445 times [2021-05-21 15:57:58,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:57:58,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687569842] [2021-05-21 15:57:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:57:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:59,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:57:59,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687569842] [2021-05-21 15:57:59,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687569842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:59,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940452339] [2021-05-21 15:57:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:57:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:57:59,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:57:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:57:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:57:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940452339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:57:59,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:57:59,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:57:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110858551] [2021-05-21 15:57:59,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:57:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:57:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:57:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:57:59,413 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:00,274 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-05-21 15:58:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:58:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:00,281 INFO L225 Difference]: With dead ends: 7821 [2021-05-21 15:58:00,281 INFO L226 Difference]: Without dead ends: 7551 [2021-05-21 15:58:00,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 880.9ms TimeCoverageRelationStatistics Valid=1587, Invalid=5055, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 15:58:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-05-21 15:58:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-05-21 15:58:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:00,333 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:00,334 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:00,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:00,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:00,338 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:00,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:00,538 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash -250618936, now seen corresponding path program 446 times [2021-05-21 15:58:00,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:00,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054848786] [2021-05-21 15:58:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:00,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:00,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054848786] [2021-05-21 15:58:00,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054848786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:00,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233110262] [2021-05-21 15:58:00,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:00,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:58:00,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:01,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233110262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:01,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:01,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607169730] [2021-05-21 15:58:01,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:01,067 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:02,075 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-05-21 15:58:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:58:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:02,083 INFO L225 Difference]: With dead ends: 7771 [2021-05-21 15:58:02,083 INFO L226 Difference]: Without dead ends: 7501 [2021-05-21 15:58:02,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=1730, Invalid=5580, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 15:58:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-05-21 15:58:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-05-21 15:58:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:02,142 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:02,142 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:02,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:02,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:02,146 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:02,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:02,347 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash 373756214, now seen corresponding path program 447 times [2021-05-21 15:58:02,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:02,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563165771] [2021-05-21 15:58:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:02,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:02,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563165771] [2021-05-21 15:58:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563165771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:02,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780218806] [2021-05-21 15:58:02,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:02,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:58:02,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:02,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:02,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:02,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780218806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:02,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:02,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:02,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63235839] [2021-05-21 15:58:02,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:02,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:02,888 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:03,800 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-05-21 15:58:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:58:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:03,808 INFO L225 Difference]: With dead ends: 7721 [2021-05-21 15:58:03,808 INFO L226 Difference]: Without dead ends: 7451 [2021-05-21 15:58:03,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=1694, Invalid=5278, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 15:58:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-05-21 15:58:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-05-21 15:58:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:03,867 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:03,867 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:03,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:03,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:03,872 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:04,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-05-21 15:58:04,072 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1182808070, now seen corresponding path program 448 times [2021-05-21 15:58:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:04,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750091393] [2021-05-21 15:58:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:04,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750091393] [2021-05-21 15:58:04,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750091393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674091016] [2021-05-21 15:58:04,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:04,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:58:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:04,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:04,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674091016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:04,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:04,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:04,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671405585] [2021-05-21 15:58:04,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:04,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:04,628 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:05,777 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-05-21 15:58:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:58:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:05,785 INFO L225 Difference]: With dead ends: 7671 [2021-05-21 15:58:05,785 INFO L226 Difference]: Without dead ends: 7401 [2021-05-21 15:58:05,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1113.4ms TimeCoverageRelationStatistics Valid=1845, Invalid=5811, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 15:58:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-05-21 15:58:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-05-21 15:58:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:05,842 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:05,842 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:05,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:05,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:05,846 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:06,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-05-21 15:58:06,047 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash -209142028, now seen corresponding path program 449 times [2021-05-21 15:58:06,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:06,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423581828] [2021-05-21 15:58:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:06,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:06,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423581828] [2021-05-21 15:58:06,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423581828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:06,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606400136] [2021-05-21 15:58:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:06,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:58:06,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:06,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606400136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:06,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:06,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:06,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160151398] [2021-05-21 15:58:06,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:06,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:06,559 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:07,554 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-05-21 15:58:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:58:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:07,562 INFO L225 Difference]: With dead ends: 7621 [2021-05-21 15:58:07,562 INFO L226 Difference]: Without dead ends: 7351 [2021-05-21 15:58:07,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 945.3ms TimeCoverageRelationStatistics Valid=1817, Invalid=5493, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 15:58:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-05-21 15:58:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-05-21 15:58:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:07,620 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:07,620 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:07,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:07,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:07,625 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:07,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:07,825 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash -454219324, now seen corresponding path program 450 times [2021-05-21 15:58:07,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:07,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914960156] [2021-05-21 15:58:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:08,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:08,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914960156] [2021-05-21 15:58:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914960156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:08,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637488265] [2021-05-21 15:58:08,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:08,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:58:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:08,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:08,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:08,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637488265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:08,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:08,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:08,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846630016] [2021-05-21 15:58:08,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:08,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:08,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:08,361 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:09,566 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-05-21 15:58:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:58:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:09,573 INFO L225 Difference]: With dead ends: 7571 [2021-05-21 15:58:09,573 INFO L226 Difference]: Without dead ends: 7301 [2021-05-21 15:58:09,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=1976, Invalid=6034, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 15:58:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-05-21 15:58:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-05-21 15:58:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:09,629 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:09,629 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:09,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:09,633 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:09,633 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:09,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-05-21 15:58:09,834 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash -831069646, now seen corresponding path program 451 times [2021-05-21 15:58:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:09,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537141718] [2021-05-21 15:58:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:10,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:10,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537141718] [2021-05-21 15:58:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537141718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:10,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635473507] [2021-05-21 15:58:10,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:10,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635473507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:10,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:10,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:10,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051358498] [2021-05-21 15:58:10,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:10,342 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:11,390 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-05-21 15:58:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:58:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:11,397 INFO L225 Difference]: With dead ends: 7521 [2021-05-21 15:58:11,398 INFO L226 Difference]: Without dead ends: 7251 [2021-05-21 15:58:11,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 996.5ms TimeCoverageRelationStatistics Valid=1956, Invalid=5700, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 15:58:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-05-21 15:58:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-05-21 15:58:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:11,474 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:11,474 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:11,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:11,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:11,479 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:11,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-05-21 15:58:11,679 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash 495685890, now seen corresponding path program 452 times [2021-05-21 15:58:11,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:11,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759169986] [2021-05-21 15:58:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:11,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:11,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759169986] [2021-05-21 15:58:11,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759169986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:11,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374770562] [2021-05-21 15:58:11,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:12,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:58:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:12,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374770562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:12,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:12,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147097707] [2021-05-21 15:58:12,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:12,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:12,190 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:13,483 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-05-21 15:58:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 15:58:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:13,492 INFO L225 Difference]: With dead ends: 7471 [2021-05-21 15:58:13,492 INFO L226 Difference]: Without dead ends: 7201 [2021-05-21 15:58:13,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1219.9ms TimeCoverageRelationStatistics Valid=2123, Invalid=6249, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 15:58:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-05-21 15:58:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-05-21 15:58:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:13,554 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:13,554 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:13,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:13,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:13,559 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:13,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:13,759 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:13,759 INFO L82 PathProgramCache]: Analyzing trace with hash 949902064, now seen corresponding path program 453 times [2021-05-21 15:58:13,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:13,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432458954] [2021-05-21 15:58:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:14,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:14,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432458954] [2021-05-21 15:58:14,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432458954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:14,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965489312] [2021-05-21 15:58:14,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:14,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:58:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:14,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965489312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:14,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:14,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:14,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344377150] [2021-05-21 15:58:14,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:14,292 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:15,309 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-05-21 15:58:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:58:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:15,317 INFO L225 Difference]: With dead ends: 7421 [2021-05-21 15:58:15,317 INFO L226 Difference]: Without dead ends: 7151 [2021-05-21 15:58:15,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1016.4ms TimeCoverageRelationStatistics Valid=2111, Invalid=5899, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 15:58:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-05-21 15:58:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-05-21 15:58:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:15,373 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:15,373 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:15,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:15,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:15,378 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:15,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-05-21 15:58:15,579 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1948798400, now seen corresponding path program 454 times [2021-05-21 15:58:15,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:15,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744646325] [2021-05-21 15:58:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:15,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744646325] [2021-05-21 15:58:15,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744646325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860515233] [2021-05-21 15:58:15,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:15,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:58:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:15,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:16,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860515233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:16,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:16,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:16,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146213970] [2021-05-21 15:58:16,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:16,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:16,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:16,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:16,115 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:17,382 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-05-21 15:58:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 15:58:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:17,390 INFO L225 Difference]: With dead ends: 7371 [2021-05-21 15:58:17,390 INFO L226 Difference]: Without dead ends: 7101 [2021-05-21 15:58:17,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1229.7ms TimeCoverageRelationStatistics Valid=2286, Invalid=6456, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 15:58:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-05-21 15:58:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-05-21 15:58:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:17,447 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:17,447 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:17,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:17,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:17,451 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:17,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:17,652 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 69470510, now seen corresponding path program 455 times [2021-05-21 15:58:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:17,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007032599] [2021-05-21 15:58:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:17,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007032599] [2021-05-21 15:58:17,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007032599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069128938] [2021-05-21 15:58:17,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:17,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:58:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:18,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069128938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:18,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:18,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:18,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530333443] [2021-05-21 15:58:18,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:18,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:18,146 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:19,272 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-05-21 15:58:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 15:58:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:19,279 INFO L225 Difference]: With dead ends: 7321 [2021-05-21 15:58:19,279 INFO L226 Difference]: Without dead ends: 7051 [2021-05-21 15:58:19,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1099.4ms TimeCoverageRelationStatistics Valid=2282, Invalid=6090, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 15:58:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-05-21 15:58:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-05-21 15:58:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:19,339 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:19,339 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:19,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:19,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:19,344 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:19,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:19,549 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2099789822, now seen corresponding path program 456 times [2021-05-21 15:58:19,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:19,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310460925] [2021-05-21 15:58:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:19,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310460925] [2021-05-21 15:58:19,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310460925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865454480] [2021-05-21 15:58:19,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:19,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:58:19,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:19,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:20,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865454480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:20,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:20,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:20,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298511137] [2021-05-21 15:58:20,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:20,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:20,068 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:21,379 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-05-21 15:58:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 15:58:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:21,386 INFO L225 Difference]: With dead ends: 7271 [2021-05-21 15:58:21,386 INFO L226 Difference]: Without dead ends: 7001 [2021-05-21 15:58:21,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 1264.8ms TimeCoverageRelationStatistics Valid=2465, Invalid=6655, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 15:58:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-05-21 15:58:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-05-21 15:58:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:21,441 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:21,441 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:21,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:21,445 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:21,445 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:21,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:21,646 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1580938004, now seen corresponding path program 457 times [2021-05-21 15:58:21,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:21,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955806121] [2021-05-21 15:58:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:21,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:21,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955806121] [2021-05-21 15:58:21,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955806121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:21,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011294891] [2021-05-21 15:58:21,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:22,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011294891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:22,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:22,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:22,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567691893] [2021-05-21 15:58:22,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:22,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:22,163 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:23,290 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-05-21 15:58:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 15:58:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:23,296 INFO L225 Difference]: With dead ends: 7221 [2021-05-21 15:58:23,296 INFO L226 Difference]: Without dead ends: 6951 [2021-05-21 15:58:23,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1082.8ms TimeCoverageRelationStatistics Valid=2469, Invalid=6273, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 15:58:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-05-21 15:58:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-05-21 15:58:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-05-21 15:58:23,347 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-05-21 15:58:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:23,347 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-05-21 15:58:23,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-05-21 15:58:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:23,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:23,352 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-05-21 15:58:23,552 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 998787004, now seen corresponding path program 458 times [2021-05-21 15:58:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050798619] [2021-05-21 15:58:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:23,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050798619] [2021-05-21 15:58:23,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050798619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:23,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591486154] [2021-05-21 15:58:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:23,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:58:23,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:23,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:24,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591486154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:24,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:24,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-05-21 15:58:24,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688862589] [2021-05-21 15:58:24,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:24,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:24,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:24,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:24,068 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:25,481 INFO L93 Difference]: Finished difference Result 7231 states and 19547 transitions. [2021-05-21 15:58:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 15:58:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:25,487 INFO L225 Difference]: With dead ends: 7231 [2021-05-21 15:58:25,487 INFO L226 Difference]: Without dead ends: 6961 [2021-05-21 15:58:25,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 1349.4ms TimeCoverageRelationStatistics Valid=2660, Invalid=6846, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 15:58:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-05-21 15:58:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 5978. [2021-05-21 15:58:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.82549774134181) internal successors, (16888), 5977 states have internal predecessors, (16888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16888 transitions. [2021-05-21 15:58:25,538 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16888 transitions. Word has length 180 [2021-05-21 15:58:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:25,538 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16888 transitions. [2021-05-21 15:58:25,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.055555555555555) internal successors, (182), 36 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16888 transitions. [2021-05-21 15:58:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:25,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:25,542 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:25,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-21 15:58:25,743 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:25,743 INFO L82 PathProgramCache]: Analyzing trace with hash -33860598, now seen corresponding path program 459 times [2021-05-21 15:58:25,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:25,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54648485] [2021-05-21 15:58:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:26,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54648485] [2021-05-21 15:58:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54648485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463053696] [2021-05-21 15:58:26,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:26,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:58:26,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:26,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463053696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:26,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:26,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-05-21 15:58:26,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136432253] [2021-05-21 15:58:26,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 15:58:26,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:26,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 15:58:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:58:26,259 INFO L87 Difference]: Start difference. First operand 5978 states and 16888 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:27,413 INFO L93 Difference]: Finished difference Result 7998 states and 21721 transitions. [2021-05-21 15:58:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 15:58:27,413 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:27,422 INFO L225 Difference]: With dead ends: 7998 [2021-05-21 15:58:27,422 INFO L226 Difference]: Without dead ends: 7728 [2021-05-21 15:58:27,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 1102.3ms TimeCoverageRelationStatistics Valid=2673, Invalid=6447, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 15:58:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2021-05-21 15:58:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 6158. [2021-05-21 15:58:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6158 states, 6157 states have (on average 2.833685236316388) internal successors, (17447), 6157 states have internal predecessors, (17447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 17447 transitions. [2021-05-21 15:58:27,488 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 17447 transitions. Word has length 180 [2021-05-21 15:58:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:27,488 INFO L482 AbstractCegarLoop]: Abstraction has 6158 states and 17447 transitions. [2021-05-21 15:58:27,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 17447 transitions. [2021-05-21 15:58:27,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-21 15:58:27,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:27,493 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:27,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:27,693 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:27,694 INFO L82 PathProgramCache]: Analyzing trace with hash -11517348, now seen corresponding path program 460 times [2021-05-21 15:58:27,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:27,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056654494] [2021-05-21 15:58:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:27,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056654494] [2021-05-21 15:58:27,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056654494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928142139] [2021-05-21 15:58:27,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:28,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:58:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:58:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928142139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:28,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:28,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-05-21 15:58:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754294088] [2021-05-21 15:58:28,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:28,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:28,237 INFO L87 Difference]: Start difference. First operand 6158 states and 17447 transitions. Second operand has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:29,719 INFO L93 Difference]: Finished difference Result 7821 states and 21221 transitions. [2021-05-21 15:58:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 15:58:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-05-21 15:58:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:29,726 INFO L225 Difference]: With dead ends: 7821 [2021-05-21 15:58:29,726 INFO L226 Difference]: Without dead ends: 7246 [2021-05-21 15:58:29,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1417.8ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 15:58:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-05-21 15:58:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 4003. [2021-05-21 15:58:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7406296851574212) internal successors, (10968), 4002 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 10968 transitions. [2021-05-21 15:58:29,770 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 10968 transitions. Word has length 180 [2021-05-21 15:58:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:29,770 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 10968 transitions. [2021-05-21 15:58:29,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 10968 transitions. [2021-05-21 15:58:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:29,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:29,773 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:29,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-05-21 15:58:29,974 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1598313859, now seen corresponding path program 461 times [2021-05-21 15:58:29,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:29,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267519855] [2021-05-21 15:58:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:30,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267519855] [2021-05-21 15:58:30,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267519855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198601684] [2021-05-21 15:58:30,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:30,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:58:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198601684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:30,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:30,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23643673] [2021-05-21 15:58:30,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:30,583 INFO L87 Difference]: Start difference. First operand 4003 states and 10968 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:31,235 INFO L93 Difference]: Finished difference Result 5921 states and 15007 transitions. [2021-05-21 15:58:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:58:31,236 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:31,241 INFO L225 Difference]: With dead ends: 5921 [2021-05-21 15:58:31,241 INFO L226 Difference]: Without dead ends: 5651 [2021-05-21 15:58:31,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 15:58:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-05-21 15:58:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4078. [2021-05-21 15:58:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.745401030169242) internal successors, (11193), 4077 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11193 transitions. [2021-05-21 15:58:31,281 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11193 transitions. Word has length 185 [2021-05-21 15:58:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:31,281 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11193 transitions. [2021-05-21 15:58:31,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11193 transitions. [2021-05-21 15:58:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:31,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:31,284 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:31,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-05-21 15:58:31,484 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 450321491, now seen corresponding path program 462 times [2021-05-21 15:58:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594550995] [2021-05-21 15:58:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:31,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:31,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594550995] [2021-05-21 15:58:31,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594550995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:31,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741890676] [2021-05-21 15:58:31,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:31,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:58:31,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741890676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:32,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:32,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321024799] [2021-05-21 15:58:32,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:32,110 INFO L87 Difference]: Start difference. First operand 4078 states and 11193 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:32,861 INFO L93 Difference]: Finished difference Result 6691 states and 16622 transitions. [2021-05-21 15:58:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:58:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:32,867 INFO L225 Difference]: With dead ends: 6691 [2021-05-21 15:58:32,867 INFO L226 Difference]: Without dead ends: 6421 [2021-05-21 15:58:32,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 827.0ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:58:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-05-21 15:58:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4153. [2021-05-21 15:58:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.75) internal successors, (11418), 4152 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11418 transitions. [2021-05-21 15:58:32,910 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11418 transitions. Word has length 185 [2021-05-21 15:58:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:32,910 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11418 transitions. [2021-05-21 15:58:32,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11418 transitions. [2021-05-21 15:58:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:32,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:32,913 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:33,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:33,114 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1414408383, now seen corresponding path program 463 times [2021-05-21 15:58:33,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:33,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628691225] [2021-05-21 15:58:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:33,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628691225] [2021-05-21 15:58:33,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628691225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:33,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964418674] [2021-05-21 15:58:33,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:33,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:33,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964418674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:33,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:33,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:33,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661171496] [2021-05-21 15:58:33,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:33,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:33,699 INFO L87 Difference]: Start difference. First operand 4153 states and 11418 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:34,459 INFO L93 Difference]: Finished difference Result 6721 states and 16757 transitions. [2021-05-21 15:58:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:58:34,459 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:34,465 INFO L225 Difference]: With dead ends: 6721 [2021-05-21 15:58:34,465 INFO L226 Difference]: Without dead ends: 6451 [2021-05-21 15:58:34,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 857.7ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:58:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-05-21 15:58:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4228. [2021-05-21 15:58:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7544357700496804) internal successors, (11643), 4227 states have internal predecessors, (11643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11643 transitions. [2021-05-21 15:58:34,558 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11643 transitions. Word has length 185 [2021-05-21 15:58:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:34,558 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11643 transitions. [2021-05-21 15:58:34,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11643 transitions. [2021-05-21 15:58:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:34,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:34,562 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:34,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:34,769 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -716692975, now seen corresponding path program 464 times [2021-05-21 15:58:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:34,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175336714] [2021-05-21 15:58:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:35,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:35,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175336714] [2021-05-21 15:58:35,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175336714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:35,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841979206] [2021-05-21 15:58:35,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:35,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:58:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:35,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841979206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:35,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:35,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:35,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217293795] [2021-05-21 15:58:35,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:35,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:35,395 INFO L87 Difference]: Start difference. First operand 4228 states and 11643 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:36,226 INFO L93 Difference]: Finished difference Result 6746 states and 16882 transitions. [2021-05-21 15:58:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:58:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:36,232 INFO L225 Difference]: With dead ends: 6746 [2021-05-21 15:58:36,233 INFO L226 Difference]: Without dead ends: 6476 [2021-05-21 15:58:36,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:58:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-05-21 15:58:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 4303. [2021-05-21 15:58:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.758716875871688) internal successors, (11868), 4302 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 11868 transitions. [2021-05-21 15:58:36,283 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 11868 transitions. Word has length 185 [2021-05-21 15:58:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:36,283 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 11868 transitions. [2021-05-21 15:58:36,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 11868 transitions. [2021-05-21 15:58:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:36,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:36,286 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:36,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:36,487 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:36,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1858391679, now seen corresponding path program 465 times [2021-05-21 15:58:36,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:36,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295092758] [2021-05-21 15:58:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:36,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295092758] [2021-05-21 15:58:36,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295092758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544769287] [2021-05-21 15:58:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:36,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:58:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:36,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:37,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544769287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:37,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:37,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:37,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587004406] [2021-05-21 15:58:37,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:37,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:37,094 INFO L87 Difference]: Start difference. First operand 4303 states and 11868 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:37,850 INFO L93 Difference]: Finished difference Result 6771 states and 17007 transitions. [2021-05-21 15:58:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:58:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:37,857 INFO L225 Difference]: With dead ends: 6771 [2021-05-21 15:58:37,857 INFO L226 Difference]: Without dead ends: 6501 [2021-05-21 15:58:37,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:58:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-05-21 15:58:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4378. [2021-05-21 15:58:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7628512679917754) internal successors, (12093), 4377 states have internal predecessors, (12093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12093 transitions. [2021-05-21 15:58:37,907 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12093 transitions. Word has length 185 [2021-05-21 15:58:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12093 transitions. [2021-05-21 15:58:37,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12093 transitions. [2021-05-21 15:58:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:37,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:37,911 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:38,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:38,112 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:38,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1357077839, now seen corresponding path program 466 times [2021-05-21 15:58:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:38,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693135930] [2021-05-21 15:58:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:38,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:38,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693135930] [2021-05-21 15:58:38,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693135930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:38,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761591227] [2021-05-21 15:58:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:38,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:58:38,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:38,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:38,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:38,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761591227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:38,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:38,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:38,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689503624] [2021-05-21 15:58:38,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:38,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:38,732 INFO L87 Difference]: Start difference. First operand 4378 states and 12093 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:39,540 INFO L93 Difference]: Finished difference Result 6796 states and 17132 transitions. [2021-05-21 15:58:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:58:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:39,546 INFO L225 Difference]: With dead ends: 6796 [2021-05-21 15:58:39,546 INFO L226 Difference]: Without dead ends: 6526 [2021-05-21 15:58:39,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:58:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-05-21 15:58:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4453. [2021-05-21 15:58:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.766846361185984) internal successors, (12318), 4452 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12318 transitions. [2021-05-21 15:58:39,589 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12318 transitions. Word has length 185 [2021-05-21 15:58:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:39,589 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12318 transitions. [2021-05-21 15:58:39,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12318 transitions. [2021-05-21 15:58:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:39,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:39,592 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:39,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-05-21 15:58:39,793 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1833573181, now seen corresponding path program 467 times [2021-05-21 15:58:39,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:39,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139580486] [2021-05-21 15:58:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:40,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:40,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139580486] [2021-05-21 15:58:40,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139580486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:40,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944671179] [2021-05-21 15:58:40,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:40,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:58:40,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:40,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:40,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:40,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944671179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:40,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:40,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825697948] [2021-05-21 15:58:40,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:40,348 INFO L87 Difference]: Start difference. First operand 4453 states and 12318 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:41,153 INFO L93 Difference]: Finished difference Result 6821 states and 17257 transitions. [2021-05-21 15:58:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:58:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:41,159 INFO L225 Difference]: With dead ends: 6821 [2021-05-21 15:58:41,159 INFO L226 Difference]: Without dead ends: 6551 [2021-05-21 15:58:41,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 822.8ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:58:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-05-21 15:58:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4528. [2021-05-21 15:58:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.7707090788601723) internal successors, (12543), 4527 states have internal predecessors, (12543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12543 transitions. [2021-05-21 15:58:41,203 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12543 transitions. Word has length 185 [2021-05-21 15:58:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:41,204 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12543 transitions. [2021-05-21 15:58:41,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12543 transitions. [2021-05-21 15:58:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:41,207 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:41,207 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:41,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-05-21 15:58:41,407 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash -994710003, now seen corresponding path program 468 times [2021-05-21 15:58:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:41,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016328154] [2021-05-21 15:58:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:41,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:41,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016328154] [2021-05-21 15:58:41,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016328154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:41,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266250314] [2021-05-21 15:58:41,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:41,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:58:41,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:42,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266250314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:42,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:42,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:42,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798682715] [2021-05-21 15:58:42,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:42,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:42,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:42,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:42,015 INFO L87 Difference]: Start difference. First operand 4528 states and 12543 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:42,932 INFO L93 Difference]: Finished difference Result 6846 states and 17382 transitions. [2021-05-21 15:58:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:58:42,932 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:42,938 INFO L225 Difference]: With dead ends: 6846 [2021-05-21 15:58:42,938 INFO L226 Difference]: Without dead ends: 6576 [2021-05-21 15:58:42,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:58:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-05-21 15:58:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4603. [2021-05-21 15:58:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.7744458930899607) internal successors, (12768), 4602 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12768 transitions. [2021-05-21 15:58:42,986 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12768 transitions. Word has length 185 [2021-05-21 15:58:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:42,986 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12768 transitions. [2021-05-21 15:58:42,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12768 transitions. [2021-05-21 15:58:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:42,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:42,990 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:43,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-05-21 15:58:43,190 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1129931397, now seen corresponding path program 469 times [2021-05-21 15:58:43,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:43,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790531002] [2021-05-21 15:58:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:43,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790531002] [2021-05-21 15:58:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790531002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305264727] [2021-05-21 15:58:43,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:43,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:43,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:43,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305264727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:43,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:43,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:43,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672844189] [2021-05-21 15:58:43,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:43,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:43,760 INFO L87 Difference]: Start difference. First operand 4603 states and 12768 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:44,552 INFO L93 Difference]: Finished difference Result 6871 states and 17507 transitions. [2021-05-21 15:58:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:58:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:44,559 INFO L225 Difference]: With dead ends: 6871 [2021-05-21 15:58:44,559 INFO L226 Difference]: Without dead ends: 6601 [2021-05-21 15:58:44,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 862.3ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:58:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-05-21 15:58:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4678. [2021-05-21 15:58:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.7780628608082103) internal successors, (12993), 4677 states have internal predecessors, (12993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 12993 transitions. [2021-05-21 15:58:44,614 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 12993 transitions. Word has length 185 [2021-05-21 15:58:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:44,614 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 12993 transitions. [2021-05-21 15:58:44,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 12993 transitions. [2021-05-21 15:58:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:44,618 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:44,618 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:44,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-05-21 15:58:44,818 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2006666165, now seen corresponding path program 470 times [2021-05-21 15:58:44,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:44,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389166273] [2021-05-21 15:58:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:45,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:45,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389166273] [2021-05-21 15:58:45,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389166273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:45,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891245875] [2021-05-21 15:58:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:45,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:58:45,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891245875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:45,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:45,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681229103] [2021-05-21 15:58:45,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:45,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:45,391 INFO L87 Difference]: Start difference. First operand 4678 states and 12993 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:46,287 INFO L93 Difference]: Finished difference Result 6896 states and 17632 transitions. [2021-05-21 15:58:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:58:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:46,293 INFO L225 Difference]: With dead ends: 6896 [2021-05-21 15:58:46,294 INFO L226 Difference]: Without dead ends: 6626 [2021-05-21 15:58:46,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:58:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-05-21 15:58:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 4753. [2021-05-21 15:58:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.7815656565656566) internal successors, (13218), 4752 states have internal predecessors, (13218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13218 transitions. [2021-05-21 15:58:46,341 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13218 transitions. Word has length 185 [2021-05-21 15:58:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:46,342 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13218 transitions. [2021-05-21 15:58:46,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13218 transitions. [2021-05-21 15:58:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:46,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:46,345 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:46,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-21 15:58:46,546 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash 550974777, now seen corresponding path program 471 times [2021-05-21 15:58:46,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:46,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514919800] [2021-05-21 15:58:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:46,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514919800] [2021-05-21 15:58:46,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514919800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288101641] [2021-05-21 15:58:46,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:46,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:58:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:47,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288101641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:47,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:47,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128431414] [2021-05-21 15:58:47,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:47,100 INFO L87 Difference]: Start difference. First operand 4753 states and 13218 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:47,894 INFO L93 Difference]: Finished difference Result 6921 states and 17757 transitions. [2021-05-21 15:58:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:58:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:47,900 INFO L225 Difference]: With dead ends: 6921 [2021-05-21 15:58:47,900 INFO L226 Difference]: Without dead ends: 6651 [2021-05-21 15:58:47,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:58:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-05-21 15:58:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4828. [2021-05-21 15:58:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.7849596022374143) internal successors, (13443), 4827 states have internal predecessors, (13443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13443 transitions. [2021-05-21 15:58:47,950 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13443 transitions. Word has length 185 [2021-05-21 15:58:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:47,951 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13443 transitions. [2021-05-21 15:58:47,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13443 transitions. [2021-05-21 15:58:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:47,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:47,954 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:48,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:48,155 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1915523081, now seen corresponding path program 472 times [2021-05-21 15:58:48,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:48,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20812932] [2021-05-21 15:58:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:48,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20812932] [2021-05-21 15:58:48,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20812932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993599949] [2021-05-21 15:58:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:48,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:58:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:48,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993599949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:48,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:48,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:48,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920541563] [2021-05-21 15:58:48,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:48,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:48,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:48,812 INFO L87 Difference]: Start difference. First operand 4828 states and 13443 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:49,769 INFO L93 Difference]: Finished difference Result 6946 states and 17882 transitions. [2021-05-21 15:58:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:58:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:49,775 INFO L225 Difference]: With dead ends: 6946 [2021-05-21 15:58:49,775 INFO L226 Difference]: Without dead ends: 6676 [2021-05-21 15:58:49,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:58:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-05-21 15:58:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4903. [2021-05-21 15:58:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.788249694002448) internal successors, (13668), 4902 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13668 transitions. [2021-05-21 15:58:49,825 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13668 transitions. Word has length 185 [2021-05-21 15:58:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:49,825 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13668 transitions. [2021-05-21 15:58:49,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13668 transitions. [2021-05-21 15:58:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:49,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:49,828 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:50,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:50,029 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -361708937, now seen corresponding path program 473 times [2021-05-21 15:58:50,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:50,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293787106] [2021-05-21 15:58:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:50,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293787106] [2021-05-21 15:58:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293787106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:50,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392994027] [2021-05-21 15:58:50,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:50,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:58:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:50,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392994027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:50,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:50,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:50,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536709622] [2021-05-21 15:58:50,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:50,609 INFO L87 Difference]: Start difference. First operand 4903 states and 13668 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:51,466 INFO L93 Difference]: Finished difference Result 6971 states and 18007 transitions. [2021-05-21 15:58:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:58:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:51,473 INFO L225 Difference]: With dead ends: 6971 [2021-05-21 15:58:51,473 INFO L226 Difference]: Without dead ends: 6701 [2021-05-21 15:58:51,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:58:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-05-21 15:58:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 4978. [2021-05-21 15:58:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.7914406268836647) internal successors, (13893), 4977 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 13893 transitions. [2021-05-21 15:58:51,526 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 13893 transitions. Word has length 185 [2021-05-21 15:58:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:51,526 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 13893 transitions. [2021-05-21 15:58:51,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 13893 transitions. [2021-05-21 15:58:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:51,529 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:51,530 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:51,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:51,730 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1260232377, now seen corresponding path program 474 times [2021-05-21 15:58:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:51,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433615451] [2021-05-21 15:58:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:52,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433615451] [2021-05-21 15:58:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433615451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525658941] [2021-05-21 15:58:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:52,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:58:52,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:52,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525658941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:52,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:52,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:52,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143801692] [2021-05-21 15:58:52,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:52,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:52,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:52,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:52,306 INFO L87 Difference]: Start difference. First operand 4978 states and 13893 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:53,321 INFO L93 Difference]: Finished difference Result 6996 states and 18132 transitions. [2021-05-21 15:58:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:58:53,322 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:53,328 INFO L225 Difference]: With dead ends: 6996 [2021-05-21 15:58:53,328 INFO L226 Difference]: Without dead ends: 6726 [2021-05-21 15:58:53,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1049.5ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:58:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-05-21 15:58:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5053. [2021-05-21 15:58:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.794536817102138) internal successors, (14118), 5052 states have internal predecessors, (14118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14118 transitions. [2021-05-21 15:58:53,380 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14118 transitions. Word has length 185 [2021-05-21 15:58:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:53,380 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14118 transitions. [2021-05-21 15:58:53,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14118 transitions. [2021-05-21 15:58:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:53,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:53,384 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:53,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:53,585 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:53,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:53,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1419781429, now seen corresponding path program 475 times [2021-05-21 15:58:53,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:53,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135509987] [2021-05-21 15:58:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:53,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:53,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135509987] [2021-05-21 15:58:53,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135509987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:53,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479176274] [2021-05-21 15:58:53,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:54,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479176274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:54,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:54,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:54,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909472738] [2021-05-21 15:58:54,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:54,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:54,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:54,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:54,114 INFO L87 Difference]: Start difference. First operand 5053 states and 14118 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:55,055 INFO L93 Difference]: Finished difference Result 7021 states and 18257 transitions. [2021-05-21 15:58:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:58:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:55,061 INFO L225 Difference]: With dead ends: 7021 [2021-05-21 15:58:55,061 INFO L226 Difference]: Without dead ends: 6751 [2021-05-21 15:58:55,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 964.6ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:58:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-05-21 15:58:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5128. [2021-05-21 15:58:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7975424224692804) internal successors, (14343), 5127 states have internal predecessors, (14343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14343 transitions. [2021-05-21 15:58:55,114 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14343 transitions. Word has length 185 [2021-05-21 15:58:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:55,114 INFO L482 AbstractCegarLoop]: Abstraction has 5128 states and 14343 transitions. [2021-05-21 15:58:55,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14343 transitions. [2021-05-21 15:58:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:55,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:55,118 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:55,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:55,318 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1039337477, now seen corresponding path program 476 times [2021-05-21 15:58:55,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:55,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834253381] [2021-05-21 15:58:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:55,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:55,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834253381] [2021-05-21 15:58:55,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834253381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:55,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908261342] [2021-05-21 15:58:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:55,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:58:55,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:55,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908261342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:55,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:55,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620473552] [2021-05-21 15:58:55,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:55,868 INFO L87 Difference]: Start difference. First operand 5128 states and 14343 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:56,980 INFO L93 Difference]: Finished difference Result 7046 states and 18382 transitions. [2021-05-21 15:58:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:58:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:56,987 INFO L225 Difference]: With dead ends: 7046 [2021-05-21 15:58:56,987 INFO L226 Difference]: Without dead ends: 6776 [2021-05-21 15:58:56,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:58:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-05-21 15:58:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5203. [2021-05-21 15:58:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 2.800461361014994) internal successors, (14568), 5202 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 14568 transitions. [2021-05-21 15:58:57,043 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 14568 transitions. Word has length 185 [2021-05-21 15:58:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:57,043 INFO L482 AbstractCegarLoop]: Abstraction has 5203 states and 14568 transitions. [2021-05-21 15:58:57,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 14568 transitions. [2021-05-21 15:58:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:57,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:57,047 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:57,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:57,247 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1663712627, now seen corresponding path program 477 times [2021-05-21 15:58:57,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:57,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081072780] [2021-05-21 15:58:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:57,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081072780] [2021-05-21 15:58:57,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081072780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745856483] [2021-05-21 15:58:57,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:58:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:57,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745856483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:57,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:57,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:58:57,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632154597] [2021-05-21 15:58:57,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:58:57,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:57,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:58:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:58:57,850 INFO L87 Difference]: Start difference. First operand 5203 states and 14568 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:58:58,769 INFO L93 Difference]: Finished difference Result 7071 states and 18507 transitions. [2021-05-21 15:58:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 15:58:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:58:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:58:58,776 INFO L225 Difference]: With dead ends: 7071 [2021-05-21 15:58:58,776 INFO L226 Difference]: Without dead ends: 6801 [2021-05-21 15:58:58,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:58:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-05-21 15:58:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-05-21 15:58:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.803297328027288) internal successors, (14793), 5277 states have internal predecessors, (14793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14793 transitions. [2021-05-21 15:58:58,833 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14793 transitions. Word has length 185 [2021-05-21 15:58:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:58:58,833 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14793 transitions. [2021-05-21 15:58:58,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:58:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14793 transitions. [2021-05-21 15:58:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:58:58,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:58:58,836 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:58:59,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:59,037 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:58:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:58:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1822202813, now seen corresponding path program 478 times [2021-05-21 15:58:59,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:58:59,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512219602] [2021-05-21 15:58:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:58:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:58:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:59,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:58:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512219602] [2021-05-21 15:58:59,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512219602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:59,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668126069] [2021-05-21 15:58:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:58:59,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:58:59,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:58:59,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:58:59,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:58:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:58:59,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668126069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:58:59,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:58:59,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:58:59,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191056970] [2021-05-21 15:58:59,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:58:59,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:58:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:58:59,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:58:59,598 INFO L87 Difference]: Start difference. First operand 5278 states and 14793 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:00,668 INFO L93 Difference]: Finished difference Result 7096 states and 18632 transitions. [2021-05-21 15:59:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:59:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:00,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:00,675 INFO L225 Difference]: With dead ends: 7096 [2021-05-21 15:59:00,675 INFO L226 Difference]: Without dead ends: 6826 [2021-05-21 15:59:00,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1108.2ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 15:59:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-05-21 15:59:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5353. [2021-05-21 15:59:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5353 states, 5352 states have (on average 2.8060538116591927) internal successors, (15018), 5352 states have internal predecessors, (15018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 15018 transitions. [2021-05-21 15:59:00,728 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 15018 transitions. Word has length 185 [2021-05-21 15:59:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:00,729 INFO L482 AbstractCegarLoop]: Abstraction has 5353 states and 15018 transitions. [2021-05-21 15:59:00,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 15018 transitions. [2021-05-21 15:59:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:00,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:00,732 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:00,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-05-21 15:59:00,933 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1080814385, now seen corresponding path program 479 times [2021-05-21 15:59:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:00,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946825066] [2021-05-21 15:59:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:01,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:01,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946825066] [2021-05-21 15:59:01,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946825066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:01,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559216216] [2021-05-21 15:59:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:01,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:59:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:01,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559216216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:01,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:01,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:59:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917265933] [2021-05-21 15:59:01,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:59:01,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:59:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:59:01,453 INFO L87 Difference]: Start difference. First operand 5353 states and 15018 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:02,401 INFO L93 Difference]: Finished difference Result 7121 states and 18757 transitions. [2021-05-21 15:59:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 15:59:02,401 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:02,408 INFO L225 Difference]: With dead ends: 7121 [2021-05-21 15:59:02,408 INFO L226 Difference]: Without dead ends: 6851 [2021-05-21 15:59:02,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 973.8ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 15:59:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-05-21 15:59:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5428. [2021-05-21 15:59:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 2.80873410724157) internal successors, (15243), 5427 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 15243 transitions. [2021-05-21 15:59:02,464 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 15243 transitions. Word has length 185 [2021-05-21 15:59:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:02,464 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 15243 transitions. [2021-05-21 15:59:02,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 15243 transitions. [2021-05-21 15:59:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:02,468 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:02,468 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:02,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:02,668 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash 835737089, now seen corresponding path program 480 times [2021-05-21 15:59:02,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:02,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362184645] [2021-05-21 15:59:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:02,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362184645] [2021-05-21 15:59:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362184645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396916022] [2021-05-21 15:59:02,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:03,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:59:03,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:03,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396916022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:03,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:03,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:59:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062554022] [2021-05-21 15:59:03,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:59:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:59:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:59:03,217 INFO L87 Difference]: Start difference. First operand 5428 states and 15243 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:04,390 INFO L93 Difference]: Finished difference Result 7146 states and 18882 transitions. [2021-05-21 15:59:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 15:59:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:04,396 INFO L225 Difference]: With dead ends: 7146 [2021-05-21 15:59:04,396 INFO L226 Difference]: Without dead ends: 6876 [2021-05-21 15:59:04,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 1187.9ms TimeCoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 15:59:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-05-21 15:59:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5503. [2021-05-21 15:59:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 2.8113413304253) internal successors, (15468), 5502 states have internal predecessors, (15468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 15468 transitions. [2021-05-21 15:59:04,451 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 15468 transitions. Word has length 185 [2021-05-21 15:59:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:04,451 INFO L482 AbstractCegarLoop]: Abstraction has 5503 states and 15468 transitions. [2021-05-21 15:59:04,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 15468 transitions. [2021-05-21 15:59:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:04,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:04,456 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:04,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-05-21 15:59:04,656 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 458886767, now seen corresponding path program 481 times [2021-05-21 15:59:04,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:04,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388174343] [2021-05-21 15:59:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:04,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388174343] [2021-05-21 15:59:04,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388174343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674574387] [2021-05-21 15:59:04,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:05,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:05,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674574387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:05,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:05,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:59:05,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58976918] [2021-05-21 15:59:05,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:59:05,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:59:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:59:05,172 INFO L87 Difference]: Start difference. First operand 5503 states and 15468 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:06,209 INFO L93 Difference]: Finished difference Result 7171 states and 19007 transitions. [2021-05-21 15:59:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 15:59:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:06,216 INFO L225 Difference]: With dead ends: 7171 [2021-05-21 15:59:06,217 INFO L226 Difference]: Without dead ends: 6901 [2021-05-21 15:59:06,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1032.9ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 15:59:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-05-21 15:59:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5578. [2021-05-21 15:59:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 5577 states have (on average 2.8138784292630445) internal successors, (15693), 5577 states have internal predecessors, (15693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 15693 transitions. [2021-05-21 15:59:06,304 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 15693 transitions. Word has length 185 [2021-05-21 15:59:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:06,304 INFO L482 AbstractCegarLoop]: Abstraction has 5578 states and 15693 transitions. [2021-05-21 15:59:06,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 15693 transitions. [2021-05-21 15:59:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:06,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:06,308 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:06,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:06,508 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1785642303, now seen corresponding path program 482 times [2021-05-21 15:59:06,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:06,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159420314] [2021-05-21 15:59:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:06,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159420314] [2021-05-21 15:59:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159420314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351495552] [2021-05-21 15:59:06,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:06,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:59:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:07,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351495552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:07,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:07,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:59:07,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715132527] [2021-05-21 15:59:07,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:59:07,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:59:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:59:07,047 INFO L87 Difference]: Start difference. First operand 5578 states and 15693 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:08,340 INFO L93 Difference]: Finished difference Result 7196 states and 19132 transitions. [2021-05-21 15:59:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 15:59:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:08,347 INFO L225 Difference]: With dead ends: 7196 [2021-05-21 15:59:08,347 INFO L226 Difference]: Without dead ends: 6926 [2021-05-21 15:59:08,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1285.7ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 15:59:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-05-21 15:59:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5653. [2021-05-21 15:59:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 5652 states have (on average 2.816348195329087) internal successors, (15918), 5652 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 15918 transitions. [2021-05-21 15:59:08,412 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 15918 transitions. Word has length 185 [2021-05-21 15:59:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:08,412 INFO L482 AbstractCegarLoop]: Abstraction has 5653 states and 15918 transitions. [2021-05-21 15:59:08,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 15918 transitions. [2021-05-21 15:59:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:08,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:08,417 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:08,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-05-21 15:59:08,617 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2055108819, now seen corresponding path program 483 times [2021-05-21 15:59:08,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:08,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072970915] [2021-05-21 15:59:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:08,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:08,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072970915] [2021-05-21 15:59:08,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072970915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:08,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904923261] [2021-05-21 15:59:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:08,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:59:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:09,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904923261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:09,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:09,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:59:09,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958990137] [2021-05-21 15:59:09,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:59:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:59:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:59:09,159 INFO L87 Difference]: Start difference. First operand 5653 states and 15918 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:10,212 INFO L93 Difference]: Finished difference Result 7221 states and 19257 transitions. [2021-05-21 15:59:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 15:59:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:10,219 INFO L225 Difference]: With dead ends: 7221 [2021-05-21 15:59:10,219 INFO L226 Difference]: Without dead ends: 6951 [2021-05-21 15:59:10,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1072.6ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 15:59:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-05-21 15:59:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5728. [2021-05-21 15:59:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5727 states have (on average 2.818753273965427) internal successors, (16143), 5727 states have internal predecessors, (16143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 16143 transitions. [2021-05-21 15:59:10,282 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 16143 transitions. Word has length 185 [2021-05-21 15:59:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:10,282 INFO L482 AbstractCegarLoop]: Abstraction has 5728 states and 16143 transitions. [2021-05-21 15:59:10,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 16143 transitions. [2021-05-21 15:59:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:10,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:10,286 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:10,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:10,486 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:10,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1056212483, now seen corresponding path program 484 times [2021-05-21 15:59:10,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:10,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254044277] [2021-05-21 15:59:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:10,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254044277] [2021-05-21 15:59:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254044277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415361714] [2021-05-21 15:59:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:10,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:59:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:11,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415361714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:11,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:11,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:59:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542664936] [2021-05-21 15:59:11,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:59:11,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:59:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:59:11,028 INFO L87 Difference]: Start difference. First operand 5728 states and 16143 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:12,311 INFO L93 Difference]: Finished difference Result 7246 states and 19382 transitions. [2021-05-21 15:59:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 15:59:12,311 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:12,318 INFO L225 Difference]: With dead ends: 7246 [2021-05-21 15:59:12,318 INFO L226 Difference]: Without dead ends: 6976 [2021-05-21 15:59:12,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1248.0ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 15:59:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-05-21 15:59:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5803. [2021-05-21 15:59:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5802 states have (on average 2.8210961737331957) internal successors, (16368), 5802 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 16368 transitions. [2021-05-21 15:59:12,379 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 16368 transitions. Word has length 185 [2021-05-21 15:59:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:12,380 INFO L482 AbstractCegarLoop]: Abstraction has 5803 states and 16368 transitions. [2021-05-21 15:59:12,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 16368 transitions. [2021-05-21 15:59:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:12,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:12,384 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:12,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:12,584 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1359426923, now seen corresponding path program 485 times [2021-05-21 15:59:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060048441] [2021-05-21 15:59:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:12,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:12,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060048441] [2021-05-21 15:59:12,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060048441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:12,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513497298] [2021-05-21 15:59:12,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:12,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-21 15:59:12,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:12,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:12,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:13,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513497298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:13,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:13,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:59:13,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985402546] [2021-05-21 15:59:13,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:59:13,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:59:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:59:13,090 INFO L87 Difference]: Start difference. First operand 5803 states and 16368 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:14,218 INFO L93 Difference]: Finished difference Result 7271 states and 19507 transitions. [2021-05-21 15:59:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 15:59:14,218 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:14,225 INFO L225 Difference]: With dead ends: 7271 [2021-05-21 15:59:14,225 INFO L226 Difference]: Without dead ends: 7001 [2021-05-21 15:59:14,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1093.9ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 15:59:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-05-21 15:59:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5878. [2021-05-21 15:59:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8233792751403777) internal successors, (16593), 5877 states have internal predecessors, (16593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16593 transitions. [2021-05-21 15:59:14,290 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16593 transitions. Word has length 185 [2021-05-21 15:59:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:14,291 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16593 transitions. [2021-05-21 15:59:14,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16593 transitions. [2021-05-21 15:59:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:14,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:14,295 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:14,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:14,496 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash -905221061, now seen corresponding path program 486 times [2021-05-21 15:59:14,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:14,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147109427] [2021-05-21 15:59:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:14,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147109427] [2021-05-21 15:59:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147109427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402211204] [2021-05-21 15:59:14,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:14,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-21 15:59:14,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:15,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402211204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:15,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:15,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:59:15,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416512311] [2021-05-21 15:59:15,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:59:15,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:59:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:59:15,044 INFO L87 Difference]: Start difference. First operand 5878 states and 16593 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:16,375 INFO L93 Difference]: Finished difference Result 7296 states and 19632 transitions. [2021-05-21 15:59:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 15:59:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:16,382 INFO L225 Difference]: With dead ends: 7296 [2021-05-21 15:59:16,382 INFO L226 Difference]: Without dead ends: 7026 [2021-05-21 15:59:16,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 1330.3ms TimeCoverageRelationStatistics Valid=2629, Invalid=7073, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 15:59:16,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-05-21 15:59:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5953. [2021-05-21 15:59:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5952 states have (on average 2.8256048387096775) internal successors, (16818), 5952 states have internal predecessors, (16818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 16818 transitions. [2021-05-21 15:59:16,443 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 16818 transitions. Word has length 185 [2021-05-21 15:59:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:16,443 INFO L482 AbstractCegarLoop]: Abstraction has 5953 states and 16818 transitions. [2021-05-21 15:59:16,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 16818 transitions. [2021-05-21 15:59:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:16,448 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:16,448 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:16,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-05-21 15:59:16,648 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash -290981591, now seen corresponding path program 487 times [2021-05-21 15:59:16,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:16,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140132775] [2021-05-21 15:59:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:16,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140132775] [2021-05-21 15:59:16,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140132775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:16,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601939440] [2021-05-21 15:59:16,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:16,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:17,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601939440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:17,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:17,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:59:17,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806832793] [2021-05-21 15:59:17,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:59:17,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:17,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:59:17,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:59:17,155 INFO L87 Difference]: Start difference. First operand 5953 states and 16818 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:18,299 INFO L93 Difference]: Finished difference Result 7366 states and 19877 transitions. [2021-05-21 15:59:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 15:59:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:18,306 INFO L225 Difference]: With dead ends: 7366 [2021-05-21 15:59:18,306 INFO L226 Difference]: Without dead ends: 7096 [2021-05-21 15:59:18,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1120.9ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 15:59:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-05-21 15:59:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6028. [2021-05-21 15:59:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.83026381284221) internal successors, (17058), 6027 states have internal predecessors, (17058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 17058 transitions. [2021-05-21 15:59:18,367 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 17058 transitions. Word has length 185 [2021-05-21 15:59:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:18,367 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 17058 transitions. [2021-05-21 15:59:18,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 17058 transitions. [2021-05-21 15:59:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:18,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:18,372 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:18,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:18,572 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2006223879, now seen corresponding path program 488 times [2021-05-21 15:59:18,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:18,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936977482] [2021-05-21 15:59:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:18,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:18,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936977482] [2021-05-21 15:59:18,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936977482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:18,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150665807] [2021-05-21 15:59:18,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:18,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:59:18,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:19,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150665807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:19,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:19,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:59:19,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790635301] [2021-05-21 15:59:19,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:59:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:19,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:59:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:59:19,097 INFO L87 Difference]: Start difference. First operand 6028 states and 17058 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:20,552 INFO L93 Difference]: Finished difference Result 7944 states and 21503 transitions. [2021-05-21 15:59:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 15:59:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:20,558 INFO L225 Difference]: With dead ends: 7944 [2021-05-21 15:59:20,558 INFO L226 Difference]: Without dead ends: 7321 [2021-05-21 15:59:20,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 1375.3ms TimeCoverageRelationStatistics Valid=2852, Invalid=7654, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 15:59:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7321 states. [2021-05-21 15:59:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7321 to 6103. [2021-05-21 15:59:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.833169452638479) internal successors, (17288), 6102 states have internal predecessors, (17288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-05-21 15:59:20,617 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-05-21 15:59:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:20,617 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-05-21 15:59:20,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-05-21 15:59:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:20,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:20,622 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:20,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-05-21 15:59:20,822 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1256095815, now seen corresponding path program 489 times [2021-05-21 15:59:20,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:20,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721558300] [2021-05-21 15:59:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:21,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:21,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721558300] [2021-05-21 15:59:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721558300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:21,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886963649] [2021-05-21 15:59:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:21,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-21 15:59:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:21,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:21,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886963649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:21,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:21,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-05-21 15:59:21,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059335091] [2021-05-21 15:59:21,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 15:59:21,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 15:59:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:59:21,342 INFO L87 Difference]: Start difference. First operand 6103 states and 17288 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:22,537 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-05-21 15:59:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 15:59:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:22,544 INFO L225 Difference]: With dead ends: 8148 [2021-05-21 15:59:22,544 INFO L226 Difference]: Without dead ends: 7878 [2021-05-21 15:59:22,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-05-21 15:59:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-05-21 15:59:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-05-21 15:59:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 6282 states have (on average 2.840974212034384) internal successors, (17847), 6282 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-05-21 15:59:22,607 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-05-21 15:59:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:22,608 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-05-21 15:59:22,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-05-21 15:59:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-21 15:59:22,612 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:22,612 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:22,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-05-21 15:59:22,812 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1278439065, now seen corresponding path program 490 times [2021-05-21 15:59:22,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:22,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367393806] [2021-05-21 15:59:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:23,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367393806] [2021-05-21 15:59:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367393806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628934768] [2021-05-21 15:59:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:23,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:59:23,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:59:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:23,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628934768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:23,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:23,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-05-21 15:59:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206667649] [2021-05-21 15:59:23,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 15:59:23,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:23,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 15:59:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:59:23,340 INFO L87 Difference]: Start difference. First operand 6283 states and 17847 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:24,758 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-05-21 15:59:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 15:59:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-05-21 15:59:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:24,764 INFO L225 Difference]: With dead ends: 7610 [2021-05-21 15:59:24,764 INFO L226 Difference]: Without dead ends: 7121 [2021-05-21 15:59:24,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1386.8ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 15:59:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-05-21 15:59:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-05-21 15:59:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 2.8397302071623574) internal successors, (17683), 6227 states have internal predecessors, (17683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-05-21 15:59:24,824 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-05-21 15:59:24,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:24,824 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-05-21 15:59:24,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:24,824 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-05-21 15:59:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:24,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:24,829 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:25,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-21 15:59:25,029 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash 658293267, now seen corresponding path program 491 times [2021-05-21 15:59:25,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:25,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855134997] [2021-05-21 15:59:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:25,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855134997] [2021-05-21 15:59:25,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855134997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257936724] [2021-05-21 15:59:25,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:25,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 15:59:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:25,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 15:59:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257936724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:25,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-05-21 15:59:25,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378485032] [2021-05-21 15:59:25,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-21 15:59:25,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:25,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-21 15:59:25,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:59:25,700 INFO L87 Difference]: Start difference. First operand 6228 states and 17683 transitions. Second operand has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:26,468 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-05-21 15:59:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:59:26,469 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:26,476 INFO L225 Difference]: With dead ends: 7668 [2021-05-21 15:59:26,476 INFO L226 Difference]: Without dead ends: 7334 [2021-05-21 15:59:26,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 901.8ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:59:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-05-21 15:59:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-05-21 15:59:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6312 states have (on average 2.828422053231939) internal successors, (17853), 6312 states have internal predecessors, (17853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-05-21 15:59:26,537 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-05-21 15:59:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:26,537 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-05-21 15:59:26,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 5.365853658536586) internal successors, (220), 41 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-05-21 15:59:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:26,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:26,542 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:26,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-05-21 15:59:26,742 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2055723223, now seen corresponding path program 492 times [2021-05-21 15:59:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:26,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295421024] [2021-05-21 15:59:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:27,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:27,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295421024] [2021-05-21 15:59:27,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295421024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:27,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130020652] [2021-05-21 15:59:27,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:27,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 15:59:27,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:27,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:27,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130020652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:27,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:27,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:27,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178907964] [2021-05-21 15:59:27,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:27,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:27,429 INFO L87 Difference]: Start difference. First operand 6313 states and 17853 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:28,056 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-05-21 15:59:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:59:28,056 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:28,064 INFO L225 Difference]: With dead ends: 9061 [2021-05-21 15:59:28,065 INFO L226 Difference]: Without dead ends: 8791 [2021-05-21 15:59:28,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 15:59:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-05-21 15:59:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-05-21 15:59:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:28,133 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:28,133 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:28,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:28,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:28,138 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:28,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:28,338 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1885117351, now seen corresponding path program 493 times [2021-05-21 15:59:28,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:28,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428061048] [2021-05-21 15:59:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:28,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:28,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428061048] [2021-05-21 15:59:28,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428061048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:28,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700126648] [2021-05-21 15:59:28,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700126648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:29,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:29,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:29,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656915866] [2021-05-21 15:59:29,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:29,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:29,037 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:29,735 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-05-21 15:59:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:59:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:29,743 INFO L225 Difference]: With dead ends: 8946 [2021-05-21 15:59:29,744 INFO L226 Difference]: Without dead ends: 8676 [2021-05-21 15:59:29,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:59:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-05-21 15:59:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-05-21 15:59:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:29,808 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:29,808 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:29,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:29,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:29,812 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:30,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-05-21 15:59:30,013 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1568357099, now seen corresponding path program 494 times [2021-05-21 15:59:30,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:30,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088924801] [2021-05-21 15:59:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:30,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088924801] [2021-05-21 15:59:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088924801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632752824] [2021-05-21 15:59:30,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:30,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:59:30,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:30,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:30,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632752824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:30,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:30,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:30,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569442958] [2021-05-21 15:59:30,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:30,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:30,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:30,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:30,641 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:31,349 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-05-21 15:59:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:59:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:31,356 INFO L225 Difference]: With dead ends: 8921 [2021-05-21 15:59:31,356 INFO L226 Difference]: Without dead ends: 8651 [2021-05-21 15:59:31,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 15:59:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-05-21 15:59:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-05-21 15:59:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:31,416 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:31,416 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:31,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:31,420 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:31,421 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:31,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:31,621 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1578617829, now seen corresponding path program 495 times [2021-05-21 15:59:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420954047] [2021-05-21 15:59:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:31,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420954047] [2021-05-21 15:59:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420954047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135459735] [2021-05-21 15:59:31,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:32,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 15:59:32,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:32,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:32,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135459735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:32,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:32,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:32,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081840247] [2021-05-21 15:59:32,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:32,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:32,287 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:33,044 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-05-21 15:59:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:59:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:33,052 INFO L225 Difference]: With dead ends: 8871 [2021-05-21 15:59:33,052 INFO L226 Difference]: Without dead ends: 8601 [2021-05-21 15:59:33,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:59:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-05-21 15:59:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-05-21 15:59:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:33,119 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:33,119 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:33,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:33,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:33,123 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:33,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-05-21 15:59:33,324 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -286112045, now seen corresponding path program 496 times [2021-05-21 15:59:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:33,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312096689] [2021-05-21 15:59:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:33,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:33,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312096689] [2021-05-21 15:59:33,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312096689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:33,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173696509] [2021-05-21 15:59:33,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:33,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:59:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:33,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:33,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:34,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173696509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:34,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:34,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534436372] [2021-05-21 15:59:34,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:34,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:34,006 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:34,748 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-05-21 15:59:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:59:34,749 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:34,757 INFO L225 Difference]: With dead ends: 8821 [2021-05-21 15:59:34,757 INFO L226 Difference]: Without dead ends: 8551 [2021-05-21 15:59:34,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 954.2ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 15:59:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-05-21 15:59:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-05-21 15:59:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:34,826 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:34,826 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:34,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:34,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:34,831 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:35,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-05-21 15:59:35,031 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash 411603363, now seen corresponding path program 497 times [2021-05-21 15:59:35,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:35,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285749842] [2021-05-21 15:59:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:35,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:35,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285749842] [2021-05-21 15:59:35,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285749842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:35,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015435693] [2021-05-21 15:59:35,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:35,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 15:59:35,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:35,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015435693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:35,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:35,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515996277] [2021-05-21 15:59:35,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:35,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:35,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:35,714 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:36,546 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-05-21 15:59:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 15:59:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:36,554 INFO L225 Difference]: With dead ends: 8771 [2021-05-21 15:59:36,554 INFO L226 Difference]: Without dead ends: 8501 [2021-05-21 15:59:36,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 979.5ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:59:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-05-21 15:59:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-05-21 15:59:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:36,622 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:36,622 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:36,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:36,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:36,627 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:36,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:36,827 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1308279279, now seen corresponding path program 498 times [2021-05-21 15:59:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:36,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749229236] [2021-05-21 15:59:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:37,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:37,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749229236] [2021-05-21 15:59:37,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749229236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:37,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328165099] [2021-05-21 15:59:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:37,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 15:59:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:37,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328165099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:37,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:37,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178323003] [2021-05-21 15:59:37,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:37,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:37,466 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:38,277 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-05-21 15:59:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:59:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:38,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:38,285 INFO L225 Difference]: With dead ends: 8721 [2021-05-21 15:59:38,285 INFO L226 Difference]: Without dead ends: 8451 [2021-05-21 15:59:38,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 933.6ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-05-21 15:59:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-05-21 15:59:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-05-21 15:59:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:38,353 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:38,354 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:38,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:38,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:38,358 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:38,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-05-21 15:59:38,559 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1809593119, now seen corresponding path program 499 times [2021-05-21 15:59:38,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:38,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786810879] [2021-05-21 15:59:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:38,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:38,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786810879] [2021-05-21 15:59:38,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786810879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:38,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285764840] [2021-05-21 15:59:38,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:38,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:39,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285764840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:39,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:39,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211934091] [2021-05-21 15:59:39,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:39,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:39,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:39,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:39,186 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:40,074 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-05-21 15:59:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 15:59:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:40,081 INFO L225 Difference]: With dead ends: 8671 [2021-05-21 15:59:40,081 INFO L226 Difference]: Without dead ends: 8401 [2021-05-21 15:59:40,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 998.4ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:59:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-05-21 15:59:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-05-21 15:59:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:40,140 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:40,140 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:40,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:40,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:40,145 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:40,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-05-21 15:59:40,345 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1333097777, now seen corresponding path program 500 times [2021-05-21 15:59:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:40,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454405949] [2021-05-21 15:59:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:40,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454405949] [2021-05-21 15:59:40,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454405949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031811101] [2021-05-21 15:59:40,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:40,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:59:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:40,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031811101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:40,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:40,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:40,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480291086] [2021-05-21 15:59:40,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:40,936 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:41,725 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-05-21 15:59:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 15:59:41,725 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:41,733 INFO L225 Difference]: With dead ends: 8621 [2021-05-21 15:59:41,733 INFO L226 Difference]: Without dead ends: 8351 [2021-05-21 15:59:41,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 15:59:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-05-21 15:59:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-05-21 15:59:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:41,798 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:41,798 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:41,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:41,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:41,803 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:42,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:42,003 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:42,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:42,003 INFO L82 PathProgramCache]: Analyzing trace with hash 133586335, now seen corresponding path program 501 times [2021-05-21 15:59:42,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:42,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241721838] [2021-05-21 15:59:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:42,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241721838] [2021-05-21 15:59:42,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241721838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106191857] [2021-05-21 15:59:42,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:42,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 15:59:42,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:42,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:42,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:42,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106191857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:42,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:42,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:42,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907308694] [2021-05-21 15:59:42,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:42,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:42,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:42,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:42,682 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:43,604 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-05-21 15:59:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 15:59:43,604 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:43,612 INFO L225 Difference]: With dead ends: 8571 [2021-05-21 15:59:43,612 INFO L226 Difference]: Without dead ends: 8301 [2021-05-21 15:59:43,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1078.9ms TimeCoverageRelationStatistics Valid=1691, Invalid=5449, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:59:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-05-21 15:59:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-05-21 15:59:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:43,681 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:43,681 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:43,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:43,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:43,686 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:43,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:43,886 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1635059, now seen corresponding path program 502 times [2021-05-21 15:59:43,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:43,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839069201] [2021-05-21 15:59:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:44,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839069201] [2021-05-21 15:59:44,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839069201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147490457] [2021-05-21 15:59:44,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:44,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:59:44,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147490457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:44,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:44,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449265376] [2021-05-21 15:59:44,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:44,501 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:45,364 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-05-21 15:59:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 15:59:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:45,373 INFO L225 Difference]: With dead ends: 8521 [2021-05-21 15:59:45,373 INFO L226 Difference]: Without dead ends: 8251 [2021-05-21 15:59:45,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 15:59:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-05-21 15:59:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-05-21 15:59:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:45,441 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:45,441 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:45,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:45,446 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:45,446 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:45,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-05-21 15:59:45,646 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -878369827, now seen corresponding path program 503 times [2021-05-21 15:59:45,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:45,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810391930] [2021-05-21 15:59:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:46,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:46,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810391930] [2021-05-21 15:59:46,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810391930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:46,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720810261] [2021-05-21 15:59:46,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:46,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 15:59:46,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:46,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720810261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:46,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:46,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:46,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123639014] [2021-05-21 15:59:46,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:46,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:46,313 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:47,354 INFO L93 Difference]: Finished difference Result 8471 states and 22297 transitions. [2021-05-21 15:59:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 15:59:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:47,362 INFO L225 Difference]: With dead ends: 8471 [2021-05-21 15:59:47,362 INFO L226 Difference]: Without dead ends: 8201 [2021-05-21 15:59:47,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1126.9ms TimeCoverageRelationStatistics Valid=1755, Invalid=5727, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:59:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2021-05-21 15:59:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 6328. [2021-05-21 15:59:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:47,429 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:47,429 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:47,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:47,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:47,433 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:47,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-05-21 15:59:47,634 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1679271115, now seen corresponding path program 504 times [2021-05-21 15:59:47,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:47,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940039295] [2021-05-21 15:59:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:47,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940039295] [2021-05-21 15:59:47,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940039295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204922980] [2021-05-21 15:59:47,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:48,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 15:59:48,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204922980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:48,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:48,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:48,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364577926] [2021-05-21 15:59:48,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:48,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:48,265 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:49,202 INFO L93 Difference]: Finished difference Result 8421 states and 22197 transitions. [2021-05-21 15:59:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 15:59:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:49,209 INFO L225 Difference]: With dead ends: 8421 [2021-05-21 15:59:49,209 INFO L226 Difference]: Without dead ends: 8151 [2021-05-21 15:59:49,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=1694, Invalid=5446, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 15:59:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-05-21 15:59:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 6328. [2021-05-21 15:59:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:49,268 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:49,268 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:49,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:49,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:49,272 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:49,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:49,473 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1251147877, now seen corresponding path program 505 times [2021-05-21 15:59:49,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:49,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158789342] [2021-05-21 15:59:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:49,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:49,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158789342] [2021-05-21 15:59:49,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158789342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:49,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914031337] [2021-05-21 15:59:49,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:50,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914031337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:50,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:50,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:50,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442055346] [2021-05-21 15:59:50,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:50,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:50,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:50,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:50,089 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:51,170 INFO L93 Difference]: Finished difference Result 8371 states and 22097 transitions. [2021-05-21 15:59:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 15:59:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:51,178 INFO L225 Difference]: With dead ends: 8371 [2021-05-21 15:59:51,178 INFO L226 Difference]: Without dead ends: 8101 [2021-05-21 15:59:51,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1156.8ms TimeCoverageRelationStatistics Valid=1835, Invalid=5997, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:59:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-05-21 15:59:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 6328. [2021-05-21 15:59:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:51,266 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:51,266 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:51,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:51,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:51,271 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:51,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-05-21 15:59:51,472 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:51,472 INFO L82 PathProgramCache]: Analyzing trace with hash 766587401, now seen corresponding path program 506 times [2021-05-21 15:59:51,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:51,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866098297] [2021-05-21 15:59:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:51,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:51,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866098297] [2021-05-21 15:59:51,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866098297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:51,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445561387] [2021-05-21 15:59:51,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:51,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:59:51,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445561387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301183624] [2021-05-21 15:59:52,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:52,056 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:53,032 INFO L93 Difference]: Finished difference Result 8321 states and 21997 transitions. [2021-05-21 15:59:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 15:59:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:53,040 INFO L225 Difference]: With dead ends: 8321 [2021-05-21 15:59:53,040 INFO L226 Difference]: Without dead ends: 8051 [2021-05-21 15:59:53,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 981.6ms TimeCoverageRelationStatistics Valid=1782, Invalid=5700, Unknown=0, NotChecked=0, Total=7482 [2021-05-21 15:59:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-05-21 15:59:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 6328. [2021-05-21 15:59:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:53,105 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:53,105 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:53,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:53,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:53,110 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:53,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-05-21 15:59:53,310 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash -131936039, now seen corresponding path program 507 times [2021-05-21 15:59:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:53,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880790354] [2021-05-21 15:59:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:53,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:53,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880790354] [2021-05-21 15:59:53,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880790354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:53,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383535557] [2021-05-21 15:59:53,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:53,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 15:59:53,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:53,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:53,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:53,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383535557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:53,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:53,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:53,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967802878] [2021-05-21 15:59:53,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:53,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:53,949 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:55,087 INFO L93 Difference]: Finished difference Result 8271 states and 21897 transitions. [2021-05-21 15:59:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 15:59:55,088 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:55,096 INFO L225 Difference]: With dead ends: 8271 [2021-05-21 15:59:55,096 INFO L226 Difference]: Without dead ends: 8001 [2021-05-21 15:59:55,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 1192.0ms TimeCoverageRelationStatistics Valid=1931, Invalid=6259, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 15:59:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-05-21 15:59:55,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6328. [2021-05-21 15:59:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:55,162 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:55,162 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:55,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:55,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:55,167 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:55,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:55,367 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1746889529, now seen corresponding path program 508 times [2021-05-21 15:59:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:55,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889375873] [2021-05-21 15:59:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:55,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:55,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889375873] [2021-05-21 15:59:55,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889375873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677884910] [2021-05-21 15:59:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:55,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:59:55,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:55,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677884910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:55,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:55,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:55,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990608769] [2021-05-21 15:59:55,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:55,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:55,963 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:56,937 INFO L93 Difference]: Finished difference Result 8221 states and 21797 transitions. [2021-05-21 15:59:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 15:59:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:56,945 INFO L225 Difference]: With dead ends: 8221 [2021-05-21 15:59:56,945 INFO L226 Difference]: Without dead ends: 7951 [2021-05-21 15:59:56,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=1886, Invalid=5946, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 15:59:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-05-21 15:59:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6328. [2021-05-21 15:59:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:57,015 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:57,015 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:57,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:57,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:57,019 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:57,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-05-21 15:59:57,220 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2127333481, now seen corresponding path program 509 times [2021-05-21 15:59:57,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:57,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023272359] [2021-05-21 15:59:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:57,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:57,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023272359] [2021-05-21 15:59:57,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023272359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:57,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470840221] [2021-05-21 15:59:57,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:57,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 15:59:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:57,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:57,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:57,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470840221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:57,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:57,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 15:59:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377063955] [2021-05-21 15:59:57,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 15:59:57,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 15:59:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:59:57,818 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:59:59,023 INFO L93 Difference]: Finished difference Result 8171 states and 21697 transitions. [2021-05-21 15:59:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 15:59:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 15:59:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:59:59,031 INFO L225 Difference]: With dead ends: 8171 [2021-05-21 15:59:59,031 INFO L226 Difference]: Without dead ends: 7901 [2021-05-21 15:59:59,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1212.6ms TimeCoverageRelationStatistics Valid=2043, Invalid=6513, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 15:59:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-05-21 15:59:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 6328. [2021-05-21 15:59:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 15:59:59,093 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 15:59:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:59:59,093 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 15:59:59,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:59:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 15:59:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 15:59:59,098 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:59:59,098 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:59:59,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:59,298 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:59:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:59:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1502958331, now seen corresponding path program 510 times [2021-05-21 15:59:59,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:59:59,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233035587] [2021-05-21 15:59:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:59:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:59:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:59,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:59:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233035587] [2021-05-21 15:59:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233035587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740201689] [2021-05-21 15:59:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:59:59,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 15:59:59,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:59:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:59:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:59:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:59:59,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740201689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:59:59,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:59:59,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 15:59:59,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22628207] [2021-05-21 15:59:59,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 15:59:59,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:59:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 15:59:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:59:59,871 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:00,907 INFO L93 Difference]: Finished difference Result 8121 states and 21597 transitions. [2021-05-21 16:00:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 16:00:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:00,914 INFO L225 Difference]: With dead ends: 8121 [2021-05-21 16:00:00,914 INFO L226 Difference]: Without dead ends: 7851 [2021-05-21 16:00:00,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1047.9ms TimeCoverageRelationStatistics Valid=2006, Invalid=6184, Unknown=0, NotChecked=0, Total=8190 [2021-05-21 16:00:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-05-21 16:00:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 6328. [2021-05-21 16:00:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:00,978 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:00,978 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:00,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:00,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:00,983 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:01,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:01,183 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash -693906475, now seen corresponding path program 511 times [2021-05-21 16:00:01,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:01,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511843560] [2021-05-21 16:00:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:01,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:01,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511843560] [2021-05-21 16:00:01,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511843560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:01,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314554042] [2021-05-21 16:00:01,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314554042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:01,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:01,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:01,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234277941] [2021-05-21 16:00:01,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:01,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:01,767 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:03,259 INFO L93 Difference]: Finished difference Result 8071 states and 21497 transitions. [2021-05-21 16:00:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 16:00:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:03,267 INFO L225 Difference]: With dead ends: 8071 [2021-05-21 16:00:03,267 INFO L226 Difference]: Without dead ends: 7801 [2021-05-21 16:00:03,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1438.6ms TimeCoverageRelationStatistics Valid=2171, Invalid=6759, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 16:00:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-05-21 16:00:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 6328. [2021-05-21 16:00:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:03,340 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:03,340 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:03,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:03,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:03,346 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:03,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:03,555 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:03,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2085856573, now seen corresponding path program 512 times [2021-05-21 16:00:03,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:03,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135911810] [2021-05-21 16:00:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:03,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135911810] [2021-05-21 16:00:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135911810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:03,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357221039] [2021-05-21 16:00:03,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:03,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:00:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:04,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357221039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:04,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:04,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 16:00:04,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676448817] [2021-05-21 16:00:04,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 16:00:04,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:04,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 16:00:04,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 16:00:04,153 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:05,422 INFO L93 Difference]: Finished difference Result 8021 states and 21397 transitions. [2021-05-21 16:00:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 16:00:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:05,430 INFO L225 Difference]: With dead ends: 8021 [2021-05-21 16:00:05,431 INFO L226 Difference]: Without dead ends: 7751 [2021-05-21 16:00:05,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1269.7ms TimeCoverageRelationStatistics Valid=2142, Invalid=6414, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 16:00:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-05-21 16:00:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 6328. [2021-05-21 16:00:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:05,500 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:05,500 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:05,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:05,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:05,505 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:05,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-05-21 16:00:05,707 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1964033427, now seen corresponding path program 513 times [2021-05-21 16:00:05,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:05,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024630821] [2021-05-21 16:00:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:06,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:06,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024630821] [2021-05-21 16:00:06,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024630821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:06,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159886423] [2021-05-21 16:00:06,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:06,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:00:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:06,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159886423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:06,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:06,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:06,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881752380] [2021-05-21 16:00:06,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:06,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:06,326 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:07,808 INFO L93 Difference]: Finished difference Result 7971 states and 21297 transitions. [2021-05-21 16:00:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 16:00:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:07,817 INFO L225 Difference]: With dead ends: 7971 [2021-05-21 16:00:07,817 INFO L226 Difference]: Without dead ends: 7701 [2021-05-21 16:00:07,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1459.7ms TimeCoverageRelationStatistics Valid=2315, Invalid=6997, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 16:00:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-05-21 16:00:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 6328. [2021-05-21 16:00:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:07,899 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:07,899 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:07,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:07,904 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:07,904 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:08,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-05-21 16:00:08,104 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1587183105, now seen corresponding path program 514 times [2021-05-21 16:00:08,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:08,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557960554] [2021-05-21 16:00:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:08,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:08,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557960554] [2021-05-21 16:00:08,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557960554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:08,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634685249] [2021-05-21 16:00:08,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:08,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:00:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:08,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:08,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634685249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:08,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:08,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 16:00:08,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172949409] [2021-05-21 16:00:08,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 16:00:08,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 16:00:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 16:00:08,725 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:09,987 INFO L93 Difference]: Finished difference Result 7921 states and 21197 transitions. [2021-05-21 16:00:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 16:00:09,987 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:09,995 INFO L225 Difference]: With dead ends: 7921 [2021-05-21 16:00:09,995 INFO L226 Difference]: Without dead ends: 7651 [2021-05-21 16:00:09,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 1225.2ms TimeCoverageRelationStatistics Valid=2294, Invalid=6636, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 16:00:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-05-21 16:00:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 6328. [2021-05-21 16:00:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:10,088 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:10,088 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:10,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:10,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:10,094 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:10,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:10,294 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1381028655, now seen corresponding path program 515 times [2021-05-21 16:00:10,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:10,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088374377] [2021-05-21 16:00:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:10,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:10,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088374377] [2021-05-21 16:00:10,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088374377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:10,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444107191] [2021-05-21 16:00:10,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:10,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:00:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:10,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444107191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:10,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:10,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:10,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543718165] [2021-05-21 16:00:10,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:10,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:10,930 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:12,411 INFO L93 Difference]: Finished difference Result 7871 states and 21097 transitions. [2021-05-21 16:00:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 16:00:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:12,420 INFO L225 Difference]: With dead ends: 7871 [2021-05-21 16:00:12,420 INFO L226 Difference]: Without dead ends: 7601 [2021-05-21 16:00:12,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1403.7ms TimeCoverageRelationStatistics Valid=2475, Invalid=7227, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 16:00:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-05-21 16:00:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 6328. [2021-05-21 16:00:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:12,490 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:12,490 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:12,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:12,496 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:12,496 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:12,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-05-21 16:00:12,696 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash -926812481, now seen corresponding path program 516 times [2021-05-21 16:00:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:12,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165158582] [2021-05-21 16:00:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:13,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165158582] [2021-05-21 16:00:13,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165158582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254722780] [2021-05-21 16:00:13,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:13,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:00:13,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:13,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254722780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:13,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:13,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 16:00:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131080238] [2021-05-21 16:00:13,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 16:00:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 16:00:13,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 16:00:13,344 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:14,791 INFO L93 Difference]: Finished difference Result 7821 states and 20997 transitions. [2021-05-21 16:00:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 16:00:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:14,800 INFO L225 Difference]: With dead ends: 7821 [2021-05-21 16:00:14,800 INFO L226 Difference]: Without dead ends: 7551 [2021-05-21 16:00:14,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 1299.2ms TimeCoverageRelationStatistics Valid=2462, Invalid=6850, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 16:00:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-05-21 16:00:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 6328. [2021-05-21 16:00:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:14,864 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:14,864 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:14,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:14,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:14,869 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:15,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:15,069 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash 72083855, now seen corresponding path program 517 times [2021-05-21 16:00:15,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:15,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485163843] [2021-05-21 16:00:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485163843] [2021-05-21 16:00:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485163843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020322516] [2021-05-21 16:00:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:15,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020322516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:15,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:15,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:15,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462207925] [2021-05-21 16:00:15,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:15,729 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:17,328 INFO L93 Difference]: Finished difference Result 7771 states and 20897 transitions. [2021-05-21 16:00:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 16:00:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:17,338 INFO L225 Difference]: With dead ends: 7771 [2021-05-21 16:00:17,338 INFO L226 Difference]: Without dead ends: 7501 [2021-05-21 16:00:17,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1530.1ms TimeCoverageRelationStatistics Valid=2651, Invalid=7449, Unknown=0, NotChecked=0, Total=10100 [2021-05-21 16:00:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-05-21 16:00:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 6328. [2021-05-21 16:00:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:17,415 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:17,415 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:17,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:17,420 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:17,420 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:17,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-05-21 16:00:17,621 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1807244035, now seen corresponding path program 518 times [2021-05-21 16:00:17,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:17,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404866430] [2021-05-21 16:00:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:17,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:17,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404866430] [2021-05-21 16:00:17,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404866430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:17,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953542606] [2021-05-21 16:00:17,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:18,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:00:18,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:18,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:18,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953542606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:18,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:18,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 16:00:18,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277558325] [2021-05-21 16:00:18,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 16:00:18,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:18,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 16:00:18,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 16:00:18,245 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:19,639 INFO L93 Difference]: Finished difference Result 7721 states and 20797 transitions. [2021-05-21 16:00:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 16:00:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:19,647 INFO L225 Difference]: With dead ends: 7721 [2021-05-21 16:00:19,648 INFO L226 Difference]: Without dead ends: 7451 [2021-05-21 16:00:19,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 1361.2ms TimeCoverageRelationStatistics Valid=2646, Invalid=7056, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 16:00:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-05-21 16:00:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 6328. [2021-05-21 16:00:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:19,718 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:19,718 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:19,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:19,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:19,723 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:19,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:19,939 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash 223075277, now seen corresponding path program 519 times [2021-05-21 16:00:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:19,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226834797] [2021-05-21 16:00:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:20,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:20,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226834797] [2021-05-21 16:00:20,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226834797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:20,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374443730] [2021-05-21 16:00:20,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:20,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:00:20,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:20,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:20,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:20,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374443730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:20,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:20,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:20,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862502965] [2021-05-21 16:00:20,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:20,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:20,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:20,627 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:22,331 INFO L93 Difference]: Finished difference Result 7671 states and 20697 transitions. [2021-05-21 16:00:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 16:00:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:22,339 INFO L225 Difference]: With dead ends: 7671 [2021-05-21 16:00:22,340 INFO L226 Difference]: Without dead ends: 7401 [2021-05-21 16:00:22,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2787 ImplicationChecksByTransitivity, 1707.5ms TimeCoverageRelationStatistics Valid=2843, Invalid=7663, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 16:00:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-05-21 16:00:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 6328. [2021-05-21 16:00:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:22,415 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:22,415 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:22,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:22,421 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:22,421 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:22,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:22,621 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash 837314747, now seen corresponding path program 520 times [2021-05-21 16:00:22,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:22,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311710172] [2021-05-21 16:00:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:23,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:23,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311710172] [2021-05-21 16:00:23,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311710172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:23,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560028587] [2021-05-21 16:00:23,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:23,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:00:23,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:23,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:23,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560028587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:23,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:23,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 16:00:23,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429420878] [2021-05-21 16:00:23,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 16:00:23,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 16:00:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 16:00:23,268 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:24,528 INFO L93 Difference]: Finished difference Result 7621 states and 20597 transitions. [2021-05-21 16:00:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 16:00:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:24,535 INFO L225 Difference]: With dead ends: 7621 [2021-05-21 16:00:24,535 INFO L226 Difference]: Without dead ends: 7351 [2021-05-21 16:00:24,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1349.3ms TimeCoverageRelationStatistics Valid=2846, Invalid=7254, Unknown=0, NotChecked=0, Total=10100 [2021-05-21 16:00:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-05-21 16:00:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 6328. [2021-05-21 16:00:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-05-21 16:00:24,598 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-05-21 16:00:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:24,599 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-05-21 16:00:24,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-05-21 16:00:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:24,603 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:24,603 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:24,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:24,804 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:24,804 INFO L82 PathProgramCache]: Analyzing trace with hash -877927541, now seen corresponding path program 521 times [2021-05-21 16:00:24,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:24,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608008462] [2021-05-21 16:00:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:25,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:25,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608008462] [2021-05-21 16:00:25,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608008462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:25,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252127207] [2021-05-21 16:00:25,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:25,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:00:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:25,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252127207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:25,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:25,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259508176] [2021-05-21 16:00:25,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:25,417 INFO L87 Difference]: Start difference. First operand 6328 states and 17883 transitions. Second operand has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:27,019 INFO L93 Difference]: Finished difference Result 8079 states and 21863 transitions. [2021-05-21 16:00:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 16:00:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:27,027 INFO L225 Difference]: With dead ends: 8079 [2021-05-21 16:00:27,027 INFO L226 Difference]: Without dead ends: 7456 [2021-05-21 16:00:27,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 1548.3ms TimeCoverageRelationStatistics Valid=3074, Invalid=8268, Unknown=0, NotChecked=0, Total=11342 [2021-05-21 16:00:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-05-21 16:00:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6238. [2021-05-21 16:00:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6238 states, 6237 states have (on average 2.829565496232163) internal successors, (17648), 6237 states have internal predecessors, (17648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 17648 transitions. [2021-05-21 16:00:27,098 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 17648 transitions. Word has length 190 [2021-05-21 16:00:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:27,099 INFO L482 AbstractCegarLoop]: Abstraction has 6238 states and 17648 transitions. [2021-05-21 16:00:27,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 17648 transitions. [2021-05-21 16:00:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:27,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:27,103 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:27,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:27,304 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1910575143, now seen corresponding path program 522 times [2021-05-21 16:00:27,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:27,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97881068] [2021-05-21 16:00:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:27,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:27,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97881068] [2021-05-21 16:00:27,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97881068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:27,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312249937] [2021-05-21 16:00:27,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:27,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:00:27,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312249937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:27,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:27,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-05-21 16:00:27,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283697945] [2021-05-21 16:00:27,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 16:00:27,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 16:00:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 16:00:27,915 INFO L87 Difference]: Start difference. First operand 6238 states and 17648 transitions. Second operand has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:29,200 INFO L93 Difference]: Finished difference Result 8308 states and 22581 transitions. [2021-05-21 16:00:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 16:00:29,200 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:29,208 INFO L225 Difference]: With dead ends: 8308 [2021-05-21 16:00:29,208 INFO L226 Difference]: Without dead ends: 8038 [2021-05-21 16:00:29,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 1305.3ms TimeCoverageRelationStatistics Valid=3063, Invalid=7443, Unknown=0, NotChecked=0, Total=10506 [2021-05-21 16:00:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-05-21 16:00:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 6418. [2021-05-21 16:00:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6418 states, 6417 states have (on average 2.837307152875175) internal successors, (18207), 6417 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 18207 transitions. [2021-05-21 16:00:29,279 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 18207 transitions. Word has length 190 [2021-05-21 16:00:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:29,280 INFO L482 AbstractCegarLoop]: Abstraction has 6418 states and 18207 transitions. [2021-05-21 16:00:29,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.052631578947368) internal successors, (192), 38 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 18207 transitions. [2021-05-21 16:00:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-21 16:00:29,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:29,284 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:29,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-05-21 16:00:29,485 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:29,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1888231893, now seen corresponding path program 523 times [2021-05-21 16:00:29,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:29,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236024732] [2021-05-21 16:00:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:29,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:29,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236024732] [2021-05-21 16:00:29,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236024732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:29,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125031854] [2021-05-21 16:00:29,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:29,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 16:00:29,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:30,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125031854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:30,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:30,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-05-21 16:00:30,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864174931] [2021-05-21 16:00:30,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:30,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:30,108 INFO L87 Difference]: Start difference. First operand 6418 states and 18207 transitions. Second operand has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:31,766 INFO L93 Difference]: Finished difference Result 8251 states and 22441 transitions. [2021-05-21 16:00:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 16:00:31,766 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-05-21 16:00:31,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:31,774 INFO L225 Difference]: With dead ends: 8251 [2021-05-21 16:00:31,774 INFO L226 Difference]: Without dead ends: 7676 [2021-05-21 16:00:31,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 1643.8ms TimeCoverageRelationStatistics Valid=3333, Invalid=8657, Unknown=0, NotChecked=0, Total=11990 [2021-05-21 16:00:31,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-05-21 16:00:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-05-21 16:00:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:31,840 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 190 [2021-05-21 16:00:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:31,840 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:31,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 4.948717948717949) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:31,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:31,845 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:32,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-05-21 16:00:32,045 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash 283286740, now seen corresponding path program 524 times [2021-05-21 16:00:32,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:32,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282214949] [2021-05-21 16:00:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:32,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:32,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282214949] [2021-05-21 16:00:32,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282214949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:32,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802025358] [2021-05-21 16:00:32,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:32,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:00:32,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:32,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802025358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:32,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:32,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:32,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710799777] [2021-05-21 16:00:32,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:32,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:32,729 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:33,500 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-05-21 16:00:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 16:00:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:33,510 INFO L225 Difference]: With dead ends: 8396 [2021-05-21 16:00:33,510 INFO L226 Difference]: Without dead ends: 8126 [2021-05-21 16:00:33,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 946.2ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 16:00:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-05-21 16:00:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-05-21 16:00:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:33,580 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:33,580 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:33,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:33,585 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:33,585 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:33,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-21 16:00:33,785 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:33,786 INFO L82 PathProgramCache]: Analyzing trace with hash 112680868, now seen corresponding path program 525 times [2021-05-21 16:00:33,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:33,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601847097] [2021-05-21 16:00:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:34,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:34,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601847097] [2021-05-21 16:00:34,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601847097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:34,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366371018] [2021-05-21 16:00:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:34,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:00:34,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:34,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366371018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:34,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:34,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:34,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216882702] [2021-05-21 16:00:34,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:34,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:34,607 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:35,408 INFO L93 Difference]: Finished difference Result 9141 states and 23787 transitions. [2021-05-21 16:00:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 16:00:35,408 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:35,419 INFO L225 Difference]: With dead ends: 9141 [2021-05-21 16:00:35,419 INFO L226 Difference]: Without dead ends: 8871 [2021-05-21 16:00:35,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 987.5ms TimeCoverageRelationStatistics Valid=1680, Invalid=4640, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 16:00:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8871 states. [2021-05-21 16:00:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8871 to 6453. [2021-05-21 16:00:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:35,497 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:35,497 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:35,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:35,502 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:35,502 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:35,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:35,703 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:35,703 INFO L82 PathProgramCache]: Analyzing trace with hash 954173714, now seen corresponding path program 526 times [2021-05-21 16:00:35,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:35,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130742852] [2021-05-21 16:00:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:36,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:36,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130742852] [2021-05-21 16:00:36,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130742852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:36,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949223928] [2021-05-21 16:00:36,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:36,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:00:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:36,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949223928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:36,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:36,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:36,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888518189] [2021-05-21 16:00:36,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:36,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:36,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:36,391 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:37,215 INFO L93 Difference]: Finished difference Result 9096 states and 23697 transitions. [2021-05-21 16:00:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 16:00:37,215 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:37,223 INFO L225 Difference]: With dead ends: 9096 [2021-05-21 16:00:37,224 INFO L226 Difference]: Without dead ends: 8826 [2021-05-21 16:00:37,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 966.1ms TimeCoverageRelationStatistics Valid=1664, Invalid=4656, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 16:00:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-05-21 16:00:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 6453. [2021-05-21 16:00:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:37,292 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:37,292 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:37,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:37,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:37,297 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:37,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:37,497 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash -193818654, now seen corresponding path program 527 times [2021-05-21 16:00:37,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:37,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332916706] [2021-05-21 16:00:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:37,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332916706] [2021-05-21 16:00:37,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332916706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229273432] [2021-05-21 16:00:37,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:37,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:00:37,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:37,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:38,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229273432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:38,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:38,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:38,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245668431] [2021-05-21 16:00:38,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:38,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:38,223 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:39,070 INFO L93 Difference]: Finished difference Result 9046 states and 23597 transitions. [2021-05-21 16:00:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 16:00:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:39,079 INFO L225 Difference]: With dead ends: 9046 [2021-05-21 16:00:39,079 INFO L226 Difference]: Without dead ends: 8776 [2021-05-21 16:00:39,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1021.8ms TimeCoverageRelationStatistics Valid=1687, Invalid=4955, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 16:00:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-05-21 16:00:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 6453. [2021-05-21 16:00:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:39,168 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:39,168 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:39,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:39,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:39,173 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:39,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-05-21 16:00:39,373 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:39,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2058548528, now seen corresponding path program 528 times [2021-05-21 16:00:39,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:39,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532322841] [2021-05-21 16:00:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:39,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:39,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532322841] [2021-05-21 16:00:39,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532322841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:39,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621508243] [2021-05-21 16:00:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:39,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:00:39,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:39,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:40,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621508243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:40,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:40,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:40,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209316325] [2021-05-21 16:00:40,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:40,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:40,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:40,059 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:40,865 INFO L93 Difference]: Finished difference Result 8996 states and 23497 transitions. [2021-05-21 16:00:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 16:00:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:40,874 INFO L225 Difference]: With dead ends: 8996 [2021-05-21 16:00:40,875 INFO L226 Difference]: Without dead ends: 8726 [2021-05-21 16:00:40,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 952.0ms TimeCoverageRelationStatistics Valid=1685, Invalid=4957, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 16:00:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-05-21 16:00:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 6453. [2021-05-21 16:00:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:40,947 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:40,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:40,953 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:41,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-21 16:00:41,153 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1360833120, now seen corresponding path program 529 times [2021-05-21 16:00:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:41,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528936168] [2021-05-21 16:00:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:41,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:41,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528936168] [2021-05-21 16:00:41,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528936168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:41,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189268005] [2021-05-21 16:00:41,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:41,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:41,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189268005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:41,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:41,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:41,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958795426] [2021-05-21 16:00:41,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:41,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:41,882 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:42,792 INFO L93 Difference]: Finished difference Result 8946 states and 23397 transitions. [2021-05-21 16:00:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 16:00:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:42,804 INFO L225 Difference]: With dead ends: 8946 [2021-05-21 16:00:42,804 INFO L226 Difference]: Without dead ends: 8676 [2021-05-21 16:00:42,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1104.4ms TimeCoverageRelationStatistics Valid=1710, Invalid=5262, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 16:00:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-05-21 16:00:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6453. [2021-05-21 16:00:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:42,884 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:42,884 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:42,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:42,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:42,889 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:43,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:43,090 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1214251534, now seen corresponding path program 530 times [2021-05-21 16:00:43,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:43,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833832495] [2021-05-21 16:00:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:43,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:43,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833832495] [2021-05-21 16:00:43,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833832495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:43,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223582571] [2021-05-21 16:00:43,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:43,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:00:43,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:43,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223582571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:43,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:43,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:43,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070345396] [2021-05-21 16:00:43,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:43,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:43,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:43,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:43,806 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:44,644 INFO L93 Difference]: Finished difference Result 8896 states and 23297 transitions. [2021-05-21 16:00:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 16:00:44,644 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:44,653 INFO L225 Difference]: With dead ends: 8896 [2021-05-21 16:00:44,653 INFO L226 Difference]: Without dead ends: 8626 [2021-05-21 16:00:44,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 997.0ms TimeCoverageRelationStatistics Valid=1722, Invalid=5250, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 16:00:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-05-21 16:00:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6453. [2021-05-21 16:00:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:44,734 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:44,734 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:44,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:44,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:44,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:44,739 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:44,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:44,952 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash 712937694, now seen corresponding path program 531 times [2021-05-21 16:00:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:44,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880106834] [2021-05-21 16:00:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:45,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:45,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880106834] [2021-05-21 16:00:45,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880106834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:45,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50173662] [2021-05-21 16:00:45,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:45,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:00:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:45,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:45,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50173662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:45,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:45,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876020799] [2021-05-21 16:00:45,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:45,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:45,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:45,650 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:46,619 INFO L93 Difference]: Finished difference Result 8846 states and 23197 transitions. [2021-05-21 16:00:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 16:00:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:46,628 INFO L225 Difference]: With dead ends: 8846 [2021-05-21 16:00:46,628 INFO L226 Difference]: Without dead ends: 8576 [2021-05-21 16:00:46,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1082.8ms TimeCoverageRelationStatistics Valid=1749, Invalid=5561, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 16:00:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-05-21 16:00:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6453. [2021-05-21 16:00:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:46,697 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:46,697 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:46,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:46,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:46,701 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:46,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-05-21 16:00:46,909 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1189433036, now seen corresponding path program 532 times [2021-05-21 16:00:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:46,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961400892] [2021-05-21 16:00:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:47,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:47,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961400892] [2021-05-21 16:00:47,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961400892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:47,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007187855] [2021-05-21 16:00:47,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:47,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:00:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:47,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:47,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007187855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:47,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:47,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919762509] [2021-05-21 16:00:47,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:47,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:47,548 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:48,503 INFO L93 Difference]: Finished difference Result 8796 states and 23097 transitions. [2021-05-21 16:00:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 16:00:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:48,511 INFO L225 Difference]: With dead ends: 8796 [2021-05-21 16:00:48,511 INFO L226 Difference]: Without dead ends: 8526 [2021-05-21 16:00:48,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1050.5ms TimeCoverageRelationStatistics Valid=1775, Invalid=5535, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 16:00:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2021-05-21 16:00:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 6453. [2021-05-21 16:00:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:48,576 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:48,576 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:48,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:48,580 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:48,580 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:48,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-05-21 16:00:48,781 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1638850148, now seen corresponding path program 533 times [2021-05-21 16:00:48,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:48,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814615492] [2021-05-21 16:00:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:49,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:49,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814615492] [2021-05-21 16:00:49,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814615492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:49,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713880502] [2021-05-21 16:00:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:49,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:00:49,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:49,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:49,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713880502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:49,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:49,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:49,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188922175] [2021-05-21 16:00:49,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1323, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:49,489 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:50,496 INFO L93 Difference]: Finished difference Result 8746 states and 22997 transitions. [2021-05-21 16:00:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 16:00:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:50,506 INFO L225 Difference]: With dead ends: 8746 [2021-05-21 16:00:50,506 INFO L226 Difference]: Without dead ends: 8476 [2021-05-21 16:00:50,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1155.0ms TimeCoverageRelationStatistics Valid=1804, Invalid=5852, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 16:00:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2021-05-21 16:00:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 6453. [2021-05-21 16:00:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:50,579 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:50,579 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:50,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:50,583 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:50,583 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:50,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-05-21 16:00:50,784 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1774071542, now seen corresponding path program 534 times [2021-05-21 16:00:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:50,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281438434] [2021-05-21 16:00:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:51,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:51,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281438434] [2021-05-21 16:00:51,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281438434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:51,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719885049] [2021-05-21 16:00:51,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:51,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:00:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719885049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:51,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:51,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:51,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750280523] [2021-05-21 16:00:51,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:51,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:51,458 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:52,393 INFO L93 Difference]: Finished difference Result 8696 states and 22897 transitions. [2021-05-21 16:00:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 16:00:52,394 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:52,403 INFO L225 Difference]: With dead ends: 8696 [2021-05-21 16:00:52,403 INFO L226 Difference]: Without dead ends: 8426 [2021-05-21 16:00:52,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1024.9ms TimeCoverageRelationStatistics Valid=1844, Invalid=5812, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 16:00:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-05-21 16:00:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6453. [2021-05-21 16:00:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:52,475 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:52,475 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:52,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:52,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:52,480 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:52,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-05-21 16:00:52,680 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1644160986, now seen corresponding path program 535 times [2021-05-21 16:00:52,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:52,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332133836] [2021-05-21 16:00:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:53,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:53,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332133836] [2021-05-21 16:00:53,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332133836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:53,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203668423] [2021-05-21 16:00:53,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:53,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:53,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203668423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:53,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:53,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:53,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437404780] [2021-05-21 16:00:53,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:53,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:53,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:53,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1334, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:53,337 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:54,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:54,390 INFO L93 Difference]: Finished difference Result 8646 states and 22797 transitions. [2021-05-21 16:00:54,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 16:00:54,390 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:54,399 INFO L225 Difference]: With dead ends: 8646 [2021-05-21 16:00:54,399 INFO L226 Difference]: Without dead ends: 8376 [2021-05-21 16:00:54,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 1127.8ms TimeCoverageRelationStatistics Valid=1875, Invalid=6135, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 16:00:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-05-21 16:00:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 6453. [2021-05-21 16:00:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:54,464 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:54,464 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:54,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:54,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:54,469 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:54,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-05-21 16:00:54,670 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -93165368, now seen corresponding path program 536 times [2021-05-21 16:00:54,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:54,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849722693] [2021-05-21 16:00:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:55,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849722693] [2021-05-21 16:00:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849722693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44884430] [2021-05-21 16:00:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:55,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:00:55,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:55,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44884430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:55,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:55,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:55,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860039325] [2021-05-21 16:00:55,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:55,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:55,334 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:56,313 INFO L93 Difference]: Finished difference Result 8596 states and 22697 transitions. [2021-05-21 16:00:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 16:00:56,313 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:56,323 INFO L225 Difference]: With dead ends: 8596 [2021-05-21 16:00:56,323 INFO L226 Difference]: Without dead ends: 8326 [2021-05-21 16:00:56,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 1061.3ms TimeCoverageRelationStatistics Valid=1929, Invalid=6081, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 16:00:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-05-21 16:00:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6453. [2021-05-21 16:00:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:56,396 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:56,396 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:56,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:56,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:56,401 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:56,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:56,601 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1271382936, now seen corresponding path program 537 times [2021-05-21 16:00:56,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:56,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023279224] [2021-05-21 16:00:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:56,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:56,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023279224] [2021-05-21 16:00:56,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023279224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:56,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024768497] [2021-05-21 16:00:56,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:57,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:00:57,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:57,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:57,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024768497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:57,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:57,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:00:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499736249] [2021-05-21 16:00:57,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:00:57,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:00:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:00:57,277 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:00:58,435 INFO L93 Difference]: Finished difference Result 8546 states and 22597 transitions. [2021-05-21 16:00:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 16:00:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:00:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:00:58,444 INFO L225 Difference]: With dead ends: 8546 [2021-05-21 16:00:58,444 INFO L226 Difference]: Without dead ends: 8276 [2021-05-21 16:00:58,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 1211.3ms TimeCoverageRelationStatistics Valid=1962, Invalid=6410, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 16:00:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-05-21 16:00:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6453. [2021-05-21 16:00:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:00:58,516 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:00:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:00:58,517 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:00:58,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:00:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:00:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:00:58,522 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:00:58,522 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:00:58,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-05-21 16:00:58,722 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:00:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:00:58,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1005849082, now seen corresponding path program 538 times [2021-05-21 16:00:58,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:00:58,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050648113] [2021-05-21 16:00:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:00:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:00:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:59,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:00:59,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050648113] [2021-05-21 16:00:59,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050648113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:59,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689723214] [2021-05-21 16:00:59,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:00:59,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:00:59,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:00:59,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:00:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:00:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:00:59,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689723214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:00:59,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:00:59,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:00:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189967765] [2021-05-21 16:00:59,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:00:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:00:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:00:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:00:59,329 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:00,425 INFO L93 Difference]: Finished difference Result 8496 states and 22497 transitions. [2021-05-21 16:01:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 16:01:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:00,433 INFO L225 Difference]: With dead ends: 8496 [2021-05-21 16:01:00,433 INFO L226 Difference]: Without dead ends: 8226 [2021-05-21 16:01:00,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1093.2ms TimeCoverageRelationStatistics Valid=2030, Invalid=6342, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 16:01:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-05-21 16:01:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6453. [2021-05-21 16:01:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:00,498 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:00,498 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:00,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:00,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:00,503 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:00,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:00,703 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:00,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1904372522, now seen corresponding path program 539 times [2021-05-21 16:01:00,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:00,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001653950] [2021-05-21 16:01:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:01,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001653950] [2021-05-21 16:01:01,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001653950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538078762] [2021-05-21 16:01:01,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:01,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:01:01,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:01,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:01,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:01,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538078762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:01,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:01,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:01,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82051811] [2021-05-21 16:01:01,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:01,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:01,332 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:02,535 INFO L93 Difference]: Finished difference Result 8446 states and 22397 transitions. [2021-05-21 16:01:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 16:01:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:02,543 INFO L225 Difference]: With dead ends: 8446 [2021-05-21 16:01:02,543 INFO L226 Difference]: Without dead ends: 8176 [2021-05-21 16:01:02,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 1240.1ms TimeCoverageRelationStatistics Valid=2065, Invalid=6677, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 16:01:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-05-21 16:01:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6453. [2021-05-21 16:01:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:02,617 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:02,617 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:02,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:02,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:02,622 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:02,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-05-21 16:01:02,822 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:02,823 INFO L82 PathProgramCache]: Analyzing trace with hash 775641284, now seen corresponding path program 540 times [2021-05-21 16:01:02,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:02,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976232184] [2021-05-21 16:01:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:03,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976232184] [2021-05-21 16:01:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976232184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972064] [2021-05-21 16:01:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:03,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:01:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:03,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:03,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:03,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:03,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950614519] [2021-05-21 16:01:03,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:03,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:03,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:03,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:03,472 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:04,538 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-05-21 16:01:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 16:01:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:04,547 INFO L225 Difference]: With dead ends: 8396 [2021-05-21 16:01:04,547 INFO L226 Difference]: Without dead ends: 8126 [2021-05-21 16:01:04,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 1100.9ms TimeCoverageRelationStatistics Valid=2147, Invalid=6595, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 16:01:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-05-21 16:01:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-05-21 16:01:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:04,632 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:04,632 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:04,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:04,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:04,636 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:04,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:04,837 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 395197332, now seen corresponding path program 541 times [2021-05-21 16:01:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846630710] [2021-05-21 16:01:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:05,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846630710] [2021-05-21 16:01:05,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846630710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:05,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544549483] [2021-05-21 16:01:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:05,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544549483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:05,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:05,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:05,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292189641] [2021-05-21 16:01:05,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:05,461 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:06,735 INFO L93 Difference]: Finished difference Result 8346 states and 22197 transitions. [2021-05-21 16:01:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 16:01:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:06,744 INFO L225 Difference]: With dead ends: 8346 [2021-05-21 16:01:06,744 INFO L226 Difference]: Without dead ends: 8076 [2021-05-21 16:01:06,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1269.3ms TimeCoverageRelationStatistics Valid=2184, Invalid=6936, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 16:01:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-05-21 16:01:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6453. [2021-05-21 16:01:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:06,849 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:06,849 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:06,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:06,854 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:06,854 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:07,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-05-21 16:01:07,055 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1019572482, now seen corresponding path program 542 times [2021-05-21 16:01:07,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:07,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384476370] [2021-05-21 16:01:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:07,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:07,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384476370] [2021-05-21 16:01:07,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384476370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:07,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086747170] [2021-05-21 16:01:07,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:07,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:01:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:07,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086747170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:07,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:07,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:07,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406473398] [2021-05-21 16:01:07,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:07,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:07,695 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:08,850 INFO L93 Difference]: Finished difference Result 8296 states and 22097 transitions. [2021-05-21 16:01:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 16:01:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:08,858 INFO L225 Difference]: With dead ends: 8296 [2021-05-21 16:01:08,859 INFO L226 Difference]: Without dead ends: 8026 [2021-05-21 16:01:08,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1153.5ms TimeCoverageRelationStatistics Valid=2280, Invalid=6840, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 16:01:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-05-21 16:01:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6453. [2021-05-21 16:01:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:08,927 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:08,927 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:08,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:08,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:08,932 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:09,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:09,132 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:09,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1828624338, now seen corresponding path program 543 times [2021-05-21 16:01:09,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:09,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114546196] [2021-05-21 16:01:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:09,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:09,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114546196] [2021-05-21 16:01:09,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114546196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:09,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390026854] [2021-05-21 16:01:09,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:09,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:01:09,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390026854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:09,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:09,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:09,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872588700] [2021-05-21 16:01:09,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:09,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:09,796 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:11,183 INFO L93 Difference]: Finished difference Result 8246 states and 21997 transitions. [2021-05-21 16:01:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 16:01:11,183 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:11,191 INFO L225 Difference]: With dead ends: 8246 [2021-05-21 16:01:11,192 INFO L226 Difference]: Without dead ends: 7976 [2021-05-21 16:01:11,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 1335.0ms TimeCoverageRelationStatistics Valid=2319, Invalid=7187, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 16:01:11,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-05-21 16:01:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6453. [2021-05-21 16:01:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:11,257 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:11,257 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:11,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:11,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:11,262 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:11,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:11,462 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:11,462 INFO L82 PathProgramCache]: Analyzing trace with hash 436674240, now seen corresponding path program 544 times [2021-05-21 16:01:11,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:11,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940184146] [2021-05-21 16:01:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:11,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940184146] [2021-05-21 16:01:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940184146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728480756] [2021-05-21 16:01:11,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:11,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:01:11,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:11,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:12,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728480756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:12,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:12,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:12,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332705479] [2021-05-21 16:01:12,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:12,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:12,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:12,075 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:13,259 INFO L93 Difference]: Finished difference Result 8196 states and 21897 transitions. [2021-05-21 16:01:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 16:01:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:13,268 INFO L225 Difference]: With dead ends: 8196 [2021-05-21 16:01:13,268 INFO L226 Difference]: Without dead ends: 7926 [2021-05-21 16:01:13,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1214.6ms TimeCoverageRelationStatistics Valid=2429, Invalid=7077, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 16:01:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-05-21 16:01:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6453. [2021-05-21 16:01:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:13,336 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:13,337 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:13,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:13,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:13,342 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:13,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-05-21 16:01:13,542 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 191596944, now seen corresponding path program 545 times [2021-05-21 16:01:13,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:13,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160574331] [2021-05-21 16:01:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:13,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:13,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160574331] [2021-05-21 16:01:13,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160574331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:13,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718806818] [2021-05-21 16:01:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:13,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:01:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:13,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:14,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718806818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:14,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:14,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:14,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191100699] [2021-05-21 16:01:14,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:14,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:14,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:14,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:14,177 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:15,509 INFO L93 Difference]: Finished difference Result 8146 states and 21797 transitions. [2021-05-21 16:01:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 16:01:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:15,519 INFO L225 Difference]: With dead ends: 8146 [2021-05-21 16:01:15,519 INFO L226 Difference]: Without dead ends: 7876 [2021-05-21 16:01:15,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 1345.4ms TimeCoverageRelationStatistics Valid=2470, Invalid=7430, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 16:01:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-05-21 16:01:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6453. [2021-05-21 16:01:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:15,585 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:15,585 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:15,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:15,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:15,590 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:15,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:15,790 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash -185253378, now seen corresponding path program 546 times [2021-05-21 16:01:15,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:15,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618417328] [2021-05-21 16:01:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:16,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618417328] [2021-05-21 16:01:16,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618417328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:16,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502599359] [2021-05-21 16:01:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:16,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:01:16,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:16,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502599359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:16,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:16,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:16,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412537902] [2021-05-21 16:01:16,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:16,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:16,436 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:17,581 INFO L93 Difference]: Finished difference Result 8096 states and 21697 transitions. [2021-05-21 16:01:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 16:01:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:17,590 INFO L225 Difference]: With dead ends: 8096 [2021-05-21 16:01:17,590 INFO L226 Difference]: Without dead ends: 7826 [2021-05-21 16:01:17,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 1186.0ms TimeCoverageRelationStatistics Valid=2594, Invalid=7306, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 16:01:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-05-21 16:01:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6453. [2021-05-21 16:01:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:17,657 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:17,657 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:17,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:17,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:17,662 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:17,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-05-21 16:01:17,862 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:17,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1141502158, now seen corresponding path program 547 times [2021-05-21 16:01:17,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:17,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594777392] [2021-05-21 16:01:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:18,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594777392] [2021-05-21 16:01:18,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594777392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889083603] [2021-05-21 16:01:18,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889083603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:18,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:18,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460549061] [2021-05-21 16:01:18,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:18,519 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:19,901 INFO L93 Difference]: Finished difference Result 8046 states and 21597 transitions. [2021-05-21 16:01:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 16:01:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:19,909 INFO L225 Difference]: With dead ends: 8046 [2021-05-21 16:01:19,909 INFO L226 Difference]: Without dead ends: 7776 [2021-05-21 16:01:19,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 1384.1ms TimeCoverageRelationStatistics Valid=2637, Invalid=7665, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 16:01:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-05-21 16:01:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6453. [2021-05-21 16:01:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:19,974 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:19,975 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:19,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:19,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:19,979 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:20,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:20,180 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1595718332, now seen corresponding path program 548 times [2021-05-21 16:01:20,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:20,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057431809] [2021-05-21 16:01:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:20,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:20,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057431809] [2021-05-21 16:01:20,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057431809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:20,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153925218] [2021-05-21 16:01:20,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:20,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:01:20,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:20,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153925218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:20,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:20,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:20,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870673561] [2021-05-21 16:01:20,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:20,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:20,835 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:22,149 INFO L93 Difference]: Finished difference Result 7996 states and 21497 transitions. [2021-05-21 16:01:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 16:01:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:22,157 INFO L225 Difference]: With dead ends: 7996 [2021-05-21 16:01:22,158 INFO L226 Difference]: Without dead ends: 7726 [2021-05-21 16:01:22,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 1347.8ms TimeCoverageRelationStatistics Valid=2775, Invalid=7527, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 16:01:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-05-21 16:01:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 6453. [2021-05-21 16:01:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:22,233 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:22,233 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:22,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:22,238 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:22,238 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:22,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-21 16:01:22,440 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1700352628, now seen corresponding path program 549 times [2021-05-21 16:01:22,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:22,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260812505] [2021-05-21 16:01:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:22,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:22,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260812505] [2021-05-21 16:01:22,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260812505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:22,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917295421] [2021-05-21 16:01:22,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:22,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:01:22,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:23,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917295421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:23,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:23,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:23,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356440594] [2021-05-21 16:01:23,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:23,058 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:24,535 INFO L93 Difference]: Finished difference Result 7946 states and 21397 transitions. [2021-05-21 16:01:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 16:01:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:24,544 INFO L225 Difference]: With dead ends: 7946 [2021-05-21 16:01:24,544 INFO L226 Difference]: Without dead ends: 7676 [2021-05-21 16:01:24,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2935 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=2820, Invalid=7892, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 16:01:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-05-21 16:01:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-05-21 16:01:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:24,616 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:24,617 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:24,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:24,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:24,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:24,622 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:24,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:24,822 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 715286778, now seen corresponding path program 550 times [2021-05-21 16:01:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:24,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79364194] [2021-05-21 16:01:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:25,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79364194] [2021-05-21 16:01:25,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79364194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833380389] [2021-05-21 16:01:25,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:25,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:01:25,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:25,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:25,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833380389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:25,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:25,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:25,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752555065] [2021-05-21 16:01:25,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:25,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:25,396 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:26,683 INFO L93 Difference]: Finished difference Result 7896 states and 21297 transitions. [2021-05-21 16:01:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 16:01:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:26,691 INFO L225 Difference]: With dead ends: 7896 [2021-05-21 16:01:26,691 INFO L226 Difference]: Without dead ends: 7626 [2021-05-21 16:01:26,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3047 ImplicationChecksByTransitivity, 1264.5ms TimeCoverageRelationStatistics Valid=2972, Invalid=7740, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 16:01:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-05-21 16:01:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6453. [2021-05-21 16:01:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:26,760 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:26,760 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:26,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:26,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:26,765 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:26,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-05-21 16:01:26,966 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1549361206, now seen corresponding path program 551 times [2021-05-21 16:01:26,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:26,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676726173] [2021-05-21 16:01:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:27,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:27,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676726173] [2021-05-21 16:01:27,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676726173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:27,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339558108] [2021-05-21 16:01:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:27,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-05-21 16:01:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339558108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:27,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:27,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:27,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800640045] [2021-05-21 16:01:27,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:27,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:27,592 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:29,198 INFO L93 Difference]: Finished difference Result 7846 states and 21197 transitions. [2021-05-21 16:01:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 16:01:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:29,206 INFO L225 Difference]: With dead ends: 7846 [2021-05-21 16:01:29,206 INFO L226 Difference]: Without dead ends: 7576 [2021-05-21 16:01:29,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 1568.3ms TimeCoverageRelationStatistics Valid=3019, Invalid=8111, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 16:01:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-05-21 16:01:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6453. [2021-05-21 16:01:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:29,268 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:29,268 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:29,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:29,273 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:29,273 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:29,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:29,474 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -935121736, now seen corresponding path program 552 times [2021-05-21 16:01:29,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:29,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391878899] [2021-05-21 16:01:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:29,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:29,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391878899] [2021-05-21 16:01:29,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391878899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:29,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683800254] [2021-05-21 16:01:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:29,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-21 16:01:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:29,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:30,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683800254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:30,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:30,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:30,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313909300] [2021-05-21 16:01:30,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:30,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:30,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:30,071 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:31,435 INFO L93 Difference]: Finished difference Result 7796 states and 21097 transitions. [2021-05-21 16:01:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 16:01:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:31,443 INFO L225 Difference]: With dead ends: 7796 [2021-05-21 16:01:31,443 INFO L226 Difference]: Without dead ends: 7526 [2021-05-21 16:01:31,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3219 ImplicationChecksByTransitivity, 1322.3ms TimeCoverageRelationStatistics Valid=3185, Invalid=7945, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 16:01:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-05-21 16:01:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 6453. [2021-05-21 16:01:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.833694978301302) internal successors, (18283), 6452 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-05-21 16:01:31,512 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-05-21 16:01:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:31,512 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-05-21 16:01:31,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-05-21 16:01:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:31,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:31,517 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:31,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:31,717 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1644603272, now seen corresponding path program 553 times [2021-05-21 16:01:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:31,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145353884] [2021-05-21 16:01:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:32,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:32,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145353884] [2021-05-21 16:01:32,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145353884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:32,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051011240] [2021-05-21 16:01:32,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:32,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051011240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:32,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:32,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:32,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931002956] [2021-05-21 16:01:32,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:32,317 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:33,944 INFO L93 Difference]: Finished difference Result 7806 states and 21147 transitions. [2021-05-21 16:01:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 16:01:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:33,952 INFO L225 Difference]: With dead ends: 7806 [2021-05-21 16:01:33,952 INFO L226 Difference]: Without dead ends: 7536 [2021-05-21 16:01:33,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3281 ImplicationChecksByTransitivity, 1568.0ms TimeCoverageRelationStatistics Valid=3234, Invalid=8322, Unknown=0, NotChecked=0, Total=11556 [2021-05-21 16:01:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2021-05-21 16:01:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 6453. [2021-05-21 16:01:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.8344699318040916) internal successors, (18288), 6452 states have internal predecessors, (18288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18288 transitions. [2021-05-21 16:01:34,016 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18288 transitions. Word has length 195 [2021-05-21 16:01:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:34,016 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18288 transitions. [2021-05-21 16:01:34,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.975) internal successors, (199), 40 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18288 transitions. [2021-05-21 16:01:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:34,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:34,020 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:34,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:34,221 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash 611955670, now seen corresponding path program 554 times [2021-05-21 16:01:34,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:34,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714607121] [2021-05-21 16:01:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:34,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714607121] [2021-05-21 16:01:34,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714607121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595523475] [2021-05-21 16:01:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:34,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:01:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:34,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:34,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595523475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:34,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:34,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-05-21 16:01:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740312255] [2021-05-21 16:01:34,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:34,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:34,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:34,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:34,848 INFO L87 Difference]: Start difference. First operand 6453 states and 18288 transitions. Second operand has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:36,269 INFO L93 Difference]: Finished difference Result 8548 states and 23271 transitions. [2021-05-21 16:01:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 16:01:36,269 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:36,278 INFO L225 Difference]: With dead ends: 8548 [2021-05-21 16:01:36,278 INFO L226 Difference]: Without dead ends: 8278 [2021-05-21 16:01:36,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 1359.6ms TimeCoverageRelationStatistics Valid=3415, Invalid=8141, Unknown=0, NotChecked=0, Total=11556 [2021-05-21 16:01:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-05-21 16:01:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 6633. [2021-05-21 16:01:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6633 states, 6632 states have (on average 2.8418275030156814) internal successors, (18847), 6632 states have internal predecessors, (18847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6633 states to 6633 states and 18847 transitions. [2021-05-21 16:01:36,346 INFO L78 Accepts]: Start accepts. Automaton has 6633 states and 18847 transitions. Word has length 195 [2021-05-21 16:01:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:36,347 INFO L482 AbstractCegarLoop]: Abstraction has 6633 states and 18847 transitions. [2021-05-21 16:01:36,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.051282051282051) internal successors, (197), 39 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6633 states and 18847 transitions. [2021-05-21 16:01:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-21 16:01:36,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:36,351 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:36,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-05-21 16:01:36,551 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash 634298920, now seen corresponding path program 555 times [2021-05-21 16:01:36,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:36,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786798183] [2021-05-21 16:01:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:36,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:36,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786798183] [2021-05-21 16:01:36,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786798183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:36,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602547449] [2021-05-21 16:01:36,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:36,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-05-21 16:01:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 16:01:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602547449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:37,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-05-21 16:01:37,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398041188] [2021-05-21 16:01:37,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:37,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:37,190 INFO L87 Difference]: Start difference. First operand 6633 states and 18847 transitions. Second operand has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:37,949 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-05-21 16:01:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:39,472 INFO L93 Difference]: Finished difference Result 8416 states and 22936 transitions. [2021-05-21 16:01:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 16:01:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-05-21 16:01:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:39,480 INFO L225 Difference]: With dead ends: 8416 [2021-05-21 16:01:39,480 INFO L226 Difference]: Without dead ends: 7841 [2021-05-21 16:01:39,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3679 ImplicationChecksByTransitivity, 2118.1ms TimeCoverageRelationStatistics Valid=3524, Invalid=9132, Unknown=0, NotChecked=0, Total=12656 [2021-05-21 16:01:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2021-05-21 16:01:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 4124. [2021-05-21 16:01:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4124 states, 4123 states have (on average 2.742178025709435) internal successors, (11306), 4123 states have internal predecessors, (11306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4124 states to 4124 states and 11306 transitions. [2021-05-21 16:01:39,534 INFO L78 Accepts]: Start accepts. Automaton has 4124 states and 11306 transitions. Word has length 195 [2021-05-21 16:01:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:39,534 INFO L482 AbstractCegarLoop]: Abstraction has 4124 states and 11306 transitions. [2021-05-21 16:01:39,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4124 states and 11306 transitions. [2021-05-21 16:01:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:39,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:39,538 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:39,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-05-21 16:01:39,738 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:39,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2129171812, now seen corresponding path program 556 times [2021-05-21 16:01:39,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:39,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993332620] [2021-05-21 16:01:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:40,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993332620] [2021-05-21 16:01:40,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993332620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756674254] [2021-05-21 16:01:40,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:40,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:01:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 16:01:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:40,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756674254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:40,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:40,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2021-05-21 16:01:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294422909] [2021-05-21 16:01:40,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-21 16:01:40,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-21 16:01:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 16:01:40,475 INFO L87 Difference]: Start difference. First operand 4124 states and 11306 transitions. Second operand has 42 states, 42 states have (on average 5.428571428571429) internal successors, (228), 42 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:41,330 INFO L93 Difference]: Finished difference Result 5614 states and 14606 transitions. [2021-05-21 16:01:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 16:01:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.428571428571429) internal successors, (228), 42 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:41,336 INFO L225 Difference]: With dead ends: 5614 [2021-05-21 16:01:41,336 INFO L226 Difference]: Without dead ends: 5280 [2021-05-21 16:01:41,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 1006.7ms TimeCoverageRelationStatistics Valid=1845, Invalid=4797, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 16:01:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-05-21 16:01:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4209. [2021-05-21 16:01:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4209 states, 4208 states have (on average 2.7271863117870723) internal successors, (11476), 4208 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4209 states to 4209 states and 11476 transitions. [2021-05-21 16:01:41,375 INFO L78 Accepts]: Start accepts. Automaton has 4209 states and 11476 transitions. Word has length 200 [2021-05-21 16:01:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:41,375 INFO L482 AbstractCegarLoop]: Abstraction has 4209 states and 11476 transitions. [2021-05-21 16:01:41,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 5.428571428571429) internal successors, (228), 42 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4209 states and 11476 transitions. [2021-05-21 16:01:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:41,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:41,378 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:41,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-05-21 16:01:41,579 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash 384370472, now seen corresponding path program 557 times [2021-05-21 16:01:41,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:41,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845274770] [2021-05-21 16:01:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:41,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845274770] [2021-05-21 16:01:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845274770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660560078] [2021-05-21 16:01:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:42,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-21 16:01:42,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:42,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:42,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660560078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:42,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:42,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:01:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572887935] [2021-05-21 16:01:42,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:42,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:42,260 INFO L87 Difference]: Start difference. First operand 4209 states and 11476 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:42,957 INFO L93 Difference]: Finished difference Result 7236 states and 17787 transitions. [2021-05-21 16:01:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 16:01:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:42,963 INFO L225 Difference]: With dead ends: 7236 [2021-05-21 16:01:42,963 INFO L226 Difference]: Without dead ends: 6966 [2021-05-21 16:01:42,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 900.2ms TimeCoverageRelationStatistics Valid=1624, Invalid=4076, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 16:01:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6966 states. [2021-05-21 16:01:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6966 to 4353. [2021-05-21 16:01:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.732766544117647) internal successors, (11893), 4352 states have internal predecessors, (11893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 11893 transitions. [2021-05-21 16:01:43,008 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 11893 transitions. Word has length 200 [2021-05-21 16:01:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:43,008 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 11893 transitions. [2021-05-21 16:01:43,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 11893 transitions. [2021-05-21 16:01:43,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:43,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:43,011 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:43,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-05-21 16:01:43,214 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash 486835704, now seen corresponding path program 558 times [2021-05-21 16:01:43,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:43,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450125156] [2021-05-21 16:01:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:43,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450125156] [2021-05-21 16:01:43,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450125156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835434698] [2021-05-21 16:01:43,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:43,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 16:01:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:43,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835434698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:43,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:43,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:01:43,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193208379] [2021-05-21 16:01:43,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:43,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:43,976 INFO L87 Difference]: Start difference. First operand 4353 states and 11893 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:44,783 INFO L93 Difference]: Finished difference Result 7196 states and 17782 transitions. [2021-05-21 16:01:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 16:01:44,783 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:44,790 INFO L225 Difference]: With dead ends: 7196 [2021-05-21 16:01:44,790 INFO L226 Difference]: Without dead ends: 6926 [2021-05-21 16:01:44,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1011.2ms TimeCoverageRelationStatistics Valid=1719, Invalid=4601, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 16:01:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-05-21 16:01:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 4428. [2021-05-21 16:01:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.7372938784730065) internal successors, (12118), 4427 states have internal predecessors, (12118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 12118 transitions. [2021-05-21 16:01:44,841 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 12118 transitions. Word has length 200 [2021-05-21 16:01:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:44,841 INFO L482 AbstractCegarLoop]: Abstraction has 4428 states and 12118 transitions. [2021-05-21 16:01:44,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 12118 transitions. [2021-05-21 16:01:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:44,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:44,845 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:45,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-05-21 16:01:45,045 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1477590502, now seen corresponding path program 559 times [2021-05-21 16:01:45,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:45,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373170981] [2021-05-21 16:01:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:45,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373170981] [2021-05-21 16:01:45,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373170981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385545949] [2021-05-21 16:01:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:45,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385545949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:45,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:45,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:01:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328663857] [2021-05-21 16:01:45,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:45,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:45,756 INFO L87 Difference]: Start difference. First operand 4428 states and 12118 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:46,549 INFO L93 Difference]: Finished difference Result 7246 states and 17957 transitions. [2021-05-21 16:01:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 16:01:46,549 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:46,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:46,556 INFO L225 Difference]: With dead ends: 7246 [2021-05-21 16:01:46,556 INFO L226 Difference]: Without dead ends: 6976 [2021-05-21 16:01:46,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=1615, Invalid=4391, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 16:01:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-05-21 16:01:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 4503. [2021-05-21 16:01:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.741670368725011) internal successors, (12343), 4502 states have internal predecessors, (12343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 12343 transitions. [2021-05-21 16:01:46,601 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 12343 transitions. Word has length 200 [2021-05-21 16:01:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:46,601 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 12343 transitions. [2021-05-21 16:01:46,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 12343 transitions. [2021-05-21 16:01:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:46,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:46,605 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:46,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:46,805 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1306984630, now seen corresponding path program 560 times [2021-05-21 16:01:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:46,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352063749] [2021-05-21 16:01:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:47,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:47,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352063749] [2021-05-21 16:01:47,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352063749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:47,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868424413] [2021-05-21 16:01:47,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:47,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:01:47,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:47,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868424413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:47,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:47,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:01:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761631184] [2021-05-21 16:01:47,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:47,510 INFO L87 Difference]: Start difference. First operand 4503 states and 12343 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:48,382 INFO L93 Difference]: Finished difference Result 7271 states and 18082 transitions. [2021-05-21 16:01:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 16:01:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:48,391 INFO L225 Difference]: With dead ends: 7271 [2021-05-21 16:01:48,391 INFO L226 Difference]: Without dead ends: 7001 [2021-05-21 16:01:48,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=1718, Invalid=4924, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 16:01:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-05-21 16:01:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 4578. [2021-05-21 16:01:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.7459034301944505) internal successors, (12568), 4577 states have internal predecessors, (12568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12568 transitions. [2021-05-21 16:01:48,450 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12568 transitions. Word has length 200 [2021-05-21 16:01:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:48,450 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12568 transitions. [2021-05-21 16:01:48,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12568 transitions. [2021-05-21 16:01:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:48,455 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:48,455 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:48,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-05-21 16:01:48,669 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2146489820, now seen corresponding path program 561 times [2021-05-21 16:01:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:48,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358247850] [2021-05-21 16:01:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:49,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358247850] [2021-05-21 16:01:49,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358247850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004049135] [2021-05-21 16:01:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:49,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-21 16:01:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:49,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004049135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:49,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:49,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:01:49,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99938787] [2021-05-21 16:01:49,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:49,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:49,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:49,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:49,366 INFO L87 Difference]: Start difference. First operand 4578 states and 12568 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:50,177 INFO L93 Difference]: Finished difference Result 7296 states and 18207 transitions. [2021-05-21 16:01:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 16:01:50,177 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:50,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:50,183 INFO L225 Difference]: With dead ends: 7296 [2021-05-21 16:01:50,183 INFO L226 Difference]: Without dead ends: 7026 [2021-05-21 16:01:50,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 968.4ms TimeCoverageRelationStatistics Valid=1622, Invalid=4698, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 16:01:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-05-21 16:01:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 4653. [2021-05-21 16:01:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.75) internal successors, (12793), 4652 states have internal predecessors, (12793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 12793 transitions. [2021-05-21 16:01:50,228 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 12793 transitions. Word has length 200 [2021-05-21 16:01:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:50,228 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 12793 transitions. [2021-05-21 16:01:50,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 12793 transitions. [2021-05-21 16:01:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:50,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:50,232 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:50,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:50,432 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:50,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1000485108, now seen corresponding path program 562 times [2021-05-21 16:01:50,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:50,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469942303] [2021-05-21 16:01:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:50,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:50,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469942303] [2021-05-21 16:01:50,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469942303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:50,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875787624] [2021-05-21 16:01:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:50,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:01:50,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:51,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875787624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:51,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:51,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:01:51,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374604926] [2021-05-21 16:01:51,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:51,114 INFO L87 Difference]: Start difference. First operand 4653 states and 12793 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:52,017 INFO L93 Difference]: Finished difference Result 7321 states and 18332 transitions. [2021-05-21 16:01:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 16:01:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:52,023 INFO L225 Difference]: With dead ends: 7321 [2021-05-21 16:01:52,023 INFO L226 Difference]: Without dead ends: 7051 [2021-05-21 16:01:52,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 1069.6ms TimeCoverageRelationStatistics Valid=1733, Invalid=5239, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 16:01:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-05-21 16:01:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 4728. [2021-05-21 16:01:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 2.753966574994711) internal successors, (13018), 4727 states have internal predecessors, (13018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 13018 transitions. [2021-05-21 16:01:52,086 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 13018 transitions. Word has length 200 [2021-05-21 16:01:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:52,086 INFO L482 AbstractCegarLoop]: Abstraction has 4728 states and 13018 transitions. [2021-05-21 16:01:52,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 13018 transitions. [2021-05-21 16:01:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:52,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:52,089 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:52,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:52,290 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:52,290 INFO L82 PathProgramCache]: Analyzing trace with hash -864244766, now seen corresponding path program 563 times [2021-05-21 16:01:52,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:52,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564711416] [2021-05-21 16:01:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:52,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:52,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564711416] [2021-05-21 16:01:52,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564711416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:52,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428083031] [2021-05-21 16:01:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:52,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-21 16:01:52,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:52,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:52,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:52,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428083031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:52,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:52,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:01:52,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515999208] [2021-05-21 16:01:52,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:52,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:52,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:52,930 INFO L87 Difference]: Start difference. First operand 4728 states and 13018 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:53,789 INFO L93 Difference]: Finished difference Result 7346 states and 18457 transitions. [2021-05-21 16:01:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 16:01:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:53,796 INFO L225 Difference]: With dead ends: 7346 [2021-05-21 16:01:53,797 INFO L226 Difference]: Without dead ends: 7076 [2021-05-21 16:01:53,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 951.7ms TimeCoverageRelationStatistics Valid=1645, Invalid=4997, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 16:01:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2021-05-21 16:01:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 4803. [2021-05-21 16:01:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.7578092461474384) internal successors, (13243), 4802 states have internal predecessors, (13243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 13243 transitions. [2021-05-21 16:01:53,846 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 13243 transitions. Word has length 200 [2021-05-21 16:01:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:53,846 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 13243 transitions. [2021-05-21 16:01:53,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 13243 transitions. [2021-05-21 16:01:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:53,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:53,850 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:54,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:54,050 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -166529358, now seen corresponding path program 564 times [2021-05-21 16:01:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:54,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498402359] [2021-05-21 16:01:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:54,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498402359] [2021-05-21 16:01:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498402359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:54,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747428505] [2021-05-21 16:01:54,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:54,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 16:01:54,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:54,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747428505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:54,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:54,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:01:54,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542344132] [2021-05-21 16:01:54,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:54,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:54,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:54,762 INFO L87 Difference]: Start difference. First operand 4803 states and 13243 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:55,826 INFO L93 Difference]: Finished difference Result 7371 states and 18582 transitions. [2021-05-21 16:01:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 16:01:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:55,833 INFO L225 Difference]: With dead ends: 7371 [2021-05-21 16:01:55,833 INFO L226 Difference]: Without dead ends: 7101 [2021-05-21 16:01:55,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=1764, Invalid=5546, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 16:01:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-05-21 16:01:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 4878. [2021-05-21 16:01:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 2.7615337297518967) internal successors, (13468), 4877 states have internal predecessors, (13468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 13468 transitions. [2021-05-21 16:01:55,885 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 13468 transitions. Word has length 200 [2021-05-21 16:01:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:55,885 INFO L482 AbstractCegarLoop]: Abstraction has 4878 states and 13468 transitions. [2021-05-21 16:01:55,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 13468 transitions. [2021-05-21 16:01:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:55,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:55,889 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:56,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:56,090 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1886412000, now seen corresponding path program 565 times [2021-05-21 16:01:56,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:56,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47773585] [2021-05-21 16:01:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:56,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:56,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47773585] [2021-05-21 16:01:56,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47773585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:56,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268493276] [2021-05-21 16:01:56,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:56,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268493276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:56,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:56,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:01:56,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63870978] [2021-05-21 16:01:56,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:01:56,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:56,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:01:56,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:01:56,741 INFO L87 Difference]: Start difference. First operand 4878 states and 13468 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:57,765 INFO L93 Difference]: Finished difference Result 7396 states and 18707 transitions. [2021-05-21 16:01:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 16:01:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:57,772 INFO L225 Difference]: With dead ends: 7396 [2021-05-21 16:01:57,772 INFO L226 Difference]: Without dead ends: 7126 [2021-05-21 16:01:57,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1006.6ms TimeCoverageRelationStatistics Valid=1684, Invalid=5288, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 16:01:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-05-21 16:01:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 4953. [2021-05-21 16:01:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4953 states, 4952 states have (on average 2.765145395799677) internal successors, (13693), 4952 states have internal predecessors, (13693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4953 states to 4953 states and 13693 transitions. [2021-05-21 16:01:57,822 INFO L78 Accepts]: Start accepts. Automaton has 4953 states and 13693 transitions. Word has length 200 [2021-05-21 16:01:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:57,822 INFO L482 AbstractCegarLoop]: Abstraction has 4953 states and 13693 transitions. [2021-05-21 16:01:57,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4953 states and 13693 transitions. [2021-05-21 16:01:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:57,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:57,826 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:01:58,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-05-21 16:01:58,026 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:01:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:01:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1907241456, now seen corresponding path program 566 times [2021-05-21 16:01:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:01:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206026616] [2021-05-21 16:01:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:01:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:01:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:58,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:01:58,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206026616] [2021-05-21 16:01:58,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206026616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:58,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144197459] [2021-05-21 16:01:58,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:01:58,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:01:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:01:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:01:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:01:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:01:58,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144197459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:01:58,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:01:58,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:01:58,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119924700] [2021-05-21 16:01:58,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:01:58,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:01:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:01:58,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:01:58,708 INFO L87 Difference]: Start difference. First operand 4953 states and 13693 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:01:59,841 INFO L93 Difference]: Finished difference Result 7421 states and 18832 transitions. [2021-05-21 16:01:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 16:01:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:01:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:01:59,848 INFO L225 Difference]: With dead ends: 7421 [2021-05-21 16:01:59,848 INFO L226 Difference]: Without dead ends: 7151 [2021-05-21 16:01:59,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1117.4ms TimeCoverageRelationStatistics Valid=1811, Invalid=5845, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 16:01:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-05-21 16:01:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5028. [2021-05-21 16:01:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 2.7686492938134077) internal successors, (13918), 5027 states have internal predecessors, (13918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 13918 transitions. [2021-05-21 16:01:59,902 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 13918 transitions. Word has length 200 [2021-05-21 16:01:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:01:59,902 INFO L482 AbstractCegarLoop]: Abstraction has 5028 states and 13918 transitions. [2021-05-21 16:01:59,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:01:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 13918 transitions. [2021-05-21 16:01:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:01:59,906 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:01:59,906 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:00,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-05-21 16:02:00,106 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1911230498, now seen corresponding path program 567 times [2021-05-21 16:02:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:00,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095377642] [2021-05-21 16:02:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:00,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:00,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095377642] [2021-05-21 16:02:00,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095377642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:00,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994313411] [2021-05-21 16:02:00,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:00,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-21 16:02:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:00,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:00,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994313411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:00,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:00,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:00,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070691875] [2021-05-21 16:02:00,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:00,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:00,739 INFO L87 Difference]: Start difference. First operand 5028 states and 13918 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:01,759 INFO L93 Difference]: Finished difference Result 7446 states and 18957 transitions. [2021-05-21 16:02:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 16:02:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:01,765 INFO L225 Difference]: With dead ends: 7446 [2021-05-21 16:02:01,766 INFO L226 Difference]: Without dead ends: 7176 [2021-05-21 16:02:01,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=1739, Invalid=5571, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 16:02:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-05-21 16:02:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5103. [2021-05-21 16:02:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 5102 states have (on average 2.7720501764014114) internal successors, (14143), 5102 states have internal predecessors, (14143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 14143 transitions. [2021-05-21 16:02:01,818 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 14143 transitions. Word has length 200 [2021-05-21 16:02:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:01,818 INFO L482 AbstractCegarLoop]: Abstraction has 5103 states and 14143 transitions. [2021-05-21 16:02:01,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 14143 transitions. [2021-05-21 16:02:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:01,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:01,822 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:02,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-05-21 16:02:02,022 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -444546386, now seen corresponding path program 568 times [2021-05-21 16:02:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:02,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264392415] [2021-05-21 16:02:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:02,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264392415] [2021-05-21 16:02:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264392415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828235968] [2021-05-21 16:02:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:02,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:02:02,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:02,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828235968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:02,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:02,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:02,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696201071] [2021-05-21 16:02:02,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:02,662 INFO L87 Difference]: Start difference. First operand 5103 states and 14143 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:03,776 INFO L93 Difference]: Finished difference Result 7471 states and 19082 transitions. [2021-05-21 16:02:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 16:02:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:03,782 INFO L225 Difference]: With dead ends: 7471 [2021-05-21 16:02:03,782 INFO L226 Difference]: Without dead ends: 7201 [2021-05-21 16:02:03,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 1206.9ms TimeCoverageRelationStatistics Valid=1874, Invalid=6136, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 16:02:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-05-21 16:02:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5178. [2021-05-21 16:02:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.7753525207649217) internal successors, (14368), 5177 states have internal predecessors, (14368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 14368 transitions. [2021-05-21 16:02:03,835 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 14368 transitions. Word has length 200 [2021-05-21 16:02:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:03,835 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 14368 transitions. [2021-05-21 16:02:03,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 14368 transitions. [2021-05-21 16:02:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:03,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:03,840 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:04,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-05-21 16:02:04,040 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:04,040 INFO L82 PathProgramCache]: Analyzing trace with hash -579767780, now seen corresponding path program 569 times [2021-05-21 16:02:04,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:04,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478032969] [2021-05-21 16:02:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:04,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478032969] [2021-05-21 16:02:04,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478032969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255942345] [2021-05-21 16:02:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:04,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-21 16:02:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:04,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255942345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:04,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:04,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138074433] [2021-05-21 16:02:04,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:04,657 INFO L87 Difference]: Start difference. First operand 5178 states and 14368 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:05,771 INFO L93 Difference]: Finished difference Result 7496 states and 19207 transitions. [2021-05-21 16:02:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 16:02:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:05,777 INFO L225 Difference]: With dead ends: 7496 [2021-05-21 16:02:05,777 INFO L226 Difference]: Without dead ends: 7226 [2021-05-21 16:02:05,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=1810, Invalid=5846, Unknown=0, NotChecked=0, Total=7656 [2021-05-21 16:02:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-05-21 16:02:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5253. [2021-05-21 16:02:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5253 states, 5252 states have (on average 2.7785605483625284) internal successors, (14593), 5252 states have internal predecessors, (14593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5253 states to 5253 states and 14593 transitions. [2021-05-21 16:02:05,826 INFO L78 Accepts]: Start accepts. Automaton has 5253 states and 14593 transitions. Word has length 200 [2021-05-21 16:02:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:05,826 INFO L482 AbstractCegarLoop]: Abstraction has 5253 states and 14593 transitions. [2021-05-21 16:02:05,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5253 states and 14593 transitions. [2021-05-21 16:02:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:05,830 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:05,830 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:06,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:06,031 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1456502548, now seen corresponding path program 570 times [2021-05-21 16:02:06,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:06,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416126447] [2021-05-21 16:02:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:06,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:06,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416126447] [2021-05-21 16:02:06,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416126447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:06,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26392197] [2021-05-21 16:02:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:06,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 16:02:06,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:06,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:06,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:06,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26392197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:06,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:06,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:06,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675762243] [2021-05-21 16:02:06,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:06,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:06,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:06,684 INFO L87 Difference]: Start difference. First operand 5253 states and 14593 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:07,945 INFO L93 Difference]: Finished difference Result 7521 states and 19332 transitions. [2021-05-21 16:02:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 16:02:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:07,953 INFO L225 Difference]: With dead ends: 7521 [2021-05-21 16:02:07,953 INFO L226 Difference]: Without dead ends: 7251 [2021-05-21 16:02:07,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 1247.7ms TimeCoverageRelationStatistics Valid=1953, Invalid=6419, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 16:02:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-05-21 16:02:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5328. [2021-05-21 16:02:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 2.78167824291346) internal successors, (14818), 5327 states have internal predecessors, (14818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 14818 transitions. [2021-05-21 16:02:08,033 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 14818 transitions. Word has length 200 [2021-05-21 16:02:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:08,033 INFO L482 AbstractCegarLoop]: Abstraction has 5328 states and 14818 transitions. [2021-05-21 16:02:08,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 14818 transitions. [2021-05-21 16:02:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:08,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:08,037 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:08,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-05-21 16:02:08,237 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138394, now seen corresponding path program 571 times [2021-05-21 16:02:08,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:08,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000417464] [2021-05-21 16:02:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:08,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:08,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000417464] [2021-05-21 16:02:08,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000417464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:08,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047425673] [2021-05-21 16:02:08,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047425673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:08,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:08,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:08,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803656961] [2021-05-21 16:02:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:08,848 INFO L87 Difference]: Start difference. First operand 5328 states and 14818 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:09,827 INFO L93 Difference]: Finished difference Result 7546 states and 19457 transitions. [2021-05-21 16:02:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 16:02:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:09,834 INFO L225 Difference]: With dead ends: 7546 [2021-05-21 16:02:09,834 INFO L226 Difference]: Without dead ends: 7276 [2021-05-21 16:02:09,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1045.4ms TimeCoverageRelationStatistics Valid=1897, Invalid=6113, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 16:02:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-05-21 16:02:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 5403. [2021-05-21 16:02:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5402 states have (on average 2.7847093669011476) internal successors, (15043), 5402 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 15043 transitions. [2021-05-21 16:02:09,890 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 15043 transitions. Word has length 200 [2021-05-21 16:02:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:09,890 INFO L482 AbstractCegarLoop]: Abstraction has 5403 states and 15043 transitions. [2021-05-21 16:02:09,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 15043 transitions. [2021-05-21 16:02:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:09,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:09,894 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:10,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:10,094 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:10,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1829280598, now seen corresponding path program 572 times [2021-05-21 16:02:10,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:10,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604988939] [2021-05-21 16:02:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:10,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:10,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604988939] [2021-05-21 16:02:10,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604988939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:10,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360501027] [2021-05-21 16:02:10,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:10,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:02:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:10,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360501027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:10,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:10,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988266090] [2021-05-21 16:02:10,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:10,738 INFO L87 Difference]: Start difference. First operand 5403 states and 15043 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:11,932 INFO L93 Difference]: Finished difference Result 7571 states and 19582 transitions. [2021-05-21 16:02:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 16:02:11,932 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:11,939 INFO L225 Difference]: With dead ends: 7571 [2021-05-21 16:02:11,939 INFO L226 Difference]: Without dead ends: 7301 [2021-05-21 16:02:11,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 1275.3ms TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 16:02:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-05-21 16:02:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5478. [2021-05-21 16:02:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.7876574767208324) internal successors, (15268), 5477 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15268 transitions. [2021-05-21 16:02:11,998 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15268 transitions. Word has length 200 [2021-05-21 16:02:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:11,998 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15268 transitions. [2021-05-21 16:02:11,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15268 transitions. [2021-05-21 16:02:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:12,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:12,002 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:12,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,576 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:12,203 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash 188454680, now seen corresponding path program 573 times [2021-05-21 16:02:12,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:12,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266819036] [2021-05-21 16:02:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:12,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:12,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266819036] [2021-05-21 16:02:12,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266819036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:12,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065349391] [2021-05-21 16:02:12,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:12,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-21 16:02:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065349391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:12,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:12,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:12,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835916983] [2021-05-21 16:02:12,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:12,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:12,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:12,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:12,850 INFO L87 Difference]: Start difference. First operand 5478 states and 15268 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:13,897 INFO L93 Difference]: Finished difference Result 7596 states and 19707 transitions. [2021-05-21 16:02:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 16:02:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:13,905 INFO L225 Difference]: With dead ends: 7596 [2021-05-21 16:02:13,905 INFO L226 Difference]: Without dead ends: 7326 [2021-05-21 16:02:13,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1103.5ms TimeCoverageRelationStatistics Valid=2000, Invalid=6372, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 16:02:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-05-21 16:02:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5553. [2021-05-21 16:02:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 2.7905259365994235) internal successors, (15493), 5552 states have internal predecessors, (15493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 15493 transitions. [2021-05-21 16:02:13,967 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 15493 transitions. Word has length 200 [2021-05-21 16:02:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:13,967 INFO L482 AbstractCegarLoop]: Abstraction has 5553 states and 15493 transitions. [2021-05-21 16:02:13,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 15493 transitions. [2021-05-21 16:02:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:13,971 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:13,971 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:14,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:14,172 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:14,172 INFO L82 PathProgramCache]: Analyzing trace with hash -710068760, now seen corresponding path program 574 times [2021-05-21 16:02:14,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:14,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024176406] [2021-05-21 16:02:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:14,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024176406] [2021-05-21 16:02:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024176406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885217559] [2021-05-21 16:02:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:14,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:02:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:14,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:14,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885217559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:14,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:14,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478168074] [2021-05-21 16:02:14,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:14,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:14,811 INFO L87 Difference]: Start difference. First operand 5553 states and 15493 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:16,048 INFO L93 Difference]: Finished difference Result 7621 states and 19832 transitions. [2021-05-21 16:02:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 16:02:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:16,057 INFO L225 Difference]: With dead ends: 7621 [2021-05-21 16:02:16,057 INFO L226 Difference]: Without dead ends: 7351 [2021-05-21 16:02:16,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1282.4ms TimeCoverageRelationStatistics Valid=2159, Invalid=6961, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 16:02:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-05-21 16:02:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5628. [2021-05-21 16:02:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.7933179314021683) internal successors, (15718), 5627 states have internal predecessors, (15718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 15718 transitions. [2021-05-21 16:02:16,133 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 15718 transitions. Word has length 200 [2021-05-21 16:02:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:16,133 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 15718 transitions. [2021-05-21 16:02:16,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 15718 transitions. [2021-05-21 16:02:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:16,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:16,138 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:16,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:16,339 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:16,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1969945046, now seen corresponding path program 575 times [2021-05-21 16:02:16,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:16,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062755947] [2021-05-21 16:02:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:16,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:16,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062755947] [2021-05-21 16:02:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062755947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310705162] [2021-05-21 16:02:16,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:16,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-21 16:02:16,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:16,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:16,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310705162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:16,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:16,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:16,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914833824] [2021-05-21 16:02:16,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:16,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:16,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:16,939 INFO L87 Difference]: Start difference. First operand 5628 states and 15718 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:18,033 INFO L93 Difference]: Finished difference Result 7646 states and 19957 transitions. [2021-05-21 16:02:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 16:02:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:18,041 INFO L225 Difference]: With dead ends: 7646 [2021-05-21 16:02:18,041 INFO L226 Difference]: Without dead ends: 7376 [2021-05-21 16:02:18,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 1125.9ms TimeCoverageRelationStatistics Valid=2119, Invalid=6623, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 16:02:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-05-21 16:02:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 5703. [2021-05-21 16:02:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5703 states, 5702 states have (on average 2.7960364784286216) internal successors, (15943), 5702 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5703 states to 5703 states and 15943 transitions. [2021-05-21 16:02:18,100 INFO L78 Accepts]: Start accepts. Automaton has 5703 states and 15943 transitions. Word has length 200 [2021-05-21 16:02:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:18,100 INFO L482 AbstractCegarLoop]: Abstraction has 5703 states and 15943 transitions. [2021-05-21 16:02:18,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5703 states and 15943 transitions. [2021-05-21 16:02:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:18,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:18,105 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:18,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:18,305 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1589501094, now seen corresponding path program 576 times [2021-05-21 16:02:18,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:18,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125093511] [2021-05-21 16:02:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:18,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125093511] [2021-05-21 16:02:18,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125093511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572550538] [2021-05-21 16:02:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:18,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 16:02:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:18,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572550538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:18,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:18,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240339375] [2021-05-21 16:02:18,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:18,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:18,944 INFO L87 Difference]: Start difference. First operand 5703 states and 15943 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:20,243 INFO L93 Difference]: Finished difference Result 7671 states and 20082 transitions. [2021-05-21 16:02:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 16:02:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:20,250 INFO L225 Difference]: With dead ends: 7671 [2021-05-21 16:02:20,251 INFO L226 Difference]: Without dead ends: 7401 [2021-05-21 16:02:20,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1337.0ms TimeCoverageRelationStatistics Valid=2286, Invalid=7220, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 16:02:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-05-21 16:02:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5778. [2021-05-21 16:02:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5778 states, 5777 states have (on average 2.79868443828977) internal successors, (16168), 5777 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 16168 transitions. [2021-05-21 16:02:20,308 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 16168 transitions. Word has length 200 [2021-05-21 16:02:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:20,309 INFO L482 AbstractCegarLoop]: Abstraction has 5778 states and 16168 transitions. [2021-05-21 16:02:20,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 16168 transitions. [2021-05-21 16:02:20,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:20,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:20,313 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:20,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-05-21 16:02:20,513 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2081091052, now seen corresponding path program 577 times [2021-05-21 16:02:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:20,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761374583] [2021-05-21 16:02:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:20,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:20,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761374583] [2021-05-21 16:02:20,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761374583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:20,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980574899] [2021-05-21 16:02:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:20,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:21,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980574899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:21,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:21,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381835552] [2021-05-21 16:02:21,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:21,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:21,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:21,097 INFO L87 Difference]: Start difference. First operand 5778 states and 16168 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:22,239 INFO L93 Difference]: Finished difference Result 7696 states and 20207 transitions. [2021-05-21 16:02:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 16:02:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:22,247 INFO L225 Difference]: With dead ends: 7696 [2021-05-21 16:02:22,247 INFO L226 Difference]: Without dead ends: 7426 [2021-05-21 16:02:22,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 1176.6ms TimeCoverageRelationStatistics Valid=2254, Invalid=6866, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 16:02:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-05-21 16:02:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 5853. [2021-05-21 16:02:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5853 states, 5852 states have (on average 2.8012645249487353) internal successors, (16393), 5852 states have internal predecessors, (16393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5853 states to 5853 states and 16393 transitions. [2021-05-21 16:02:22,313 INFO L78 Accepts]: Start accepts. Automaton has 5853 states and 16393 transitions. Word has length 200 [2021-05-21 16:02:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:22,313 INFO L482 AbstractCegarLoop]: Abstraction has 5853 states and 16393 transitions. [2021-05-21 16:02:22,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5853 states and 16393 transitions. [2021-05-21 16:02:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:22,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:22,318 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:22,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:22,518 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:22,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1272039196, now seen corresponding path program 578 times [2021-05-21 16:02:22,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:22,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78011639] [2021-05-21 16:02:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:22,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:22,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78011639] [2021-05-21 16:02:22,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78011639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:22,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974860110] [2021-05-21 16:02:22,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:22,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:02:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974860110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:23,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:23,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:23,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253315582] [2021-05-21 16:02:23,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:23,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:23,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:23,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:23,129 INFO L87 Difference]: Start difference. First operand 5853 states and 16393 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:24,504 INFO L93 Difference]: Finished difference Result 7721 states and 20332 transitions. [2021-05-21 16:02:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 16:02:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:24,511 INFO L225 Difference]: With dead ends: 7721 [2021-05-21 16:02:24,511 INFO L226 Difference]: Without dead ends: 7451 [2021-05-21 16:02:24,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1408.4ms TimeCoverageRelationStatistics Valid=2429, Invalid=7471, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 16:02:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-05-21 16:02:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5928. [2021-05-21 16:02:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 2.8037793149991566) internal successors, (16618), 5927 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 16618 transitions. [2021-05-21 16:02:24,572 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 16618 transitions. Word has length 200 [2021-05-21 16:02:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:24,573 INFO L482 AbstractCegarLoop]: Abstraction has 5928 states and 16618 transitions. [2021-05-21 16:02:24,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 16618 transitions. [2021-05-21 16:02:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:24,577 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:24,577 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:24,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-21 16:02:24,777 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1630978002, now seen corresponding path program 579 times [2021-05-21 16:02:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:24,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311647524] [2021-05-21 16:02:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:25,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:25,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311647524] [2021-05-21 16:02:25,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311647524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:25,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630148463] [2021-05-21 16:02:25,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:25,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-21 16:02:25,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:25,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630148463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:25,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:25,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164827640] [2021-05-21 16:02:25,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:25,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:25,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:25,368 INFO L87 Difference]: Start difference. First operand 5928 states and 16618 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:26,543 INFO L93 Difference]: Finished difference Result 7746 states and 20457 transitions. [2021-05-21 16:02:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 16:02:26,543 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:26,550 INFO L225 Difference]: With dead ends: 7746 [2021-05-21 16:02:26,550 INFO L226 Difference]: Without dead ends: 7476 [2021-05-21 16:02:26,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 1176.6ms TimeCoverageRelationStatistics Valid=2405, Invalid=7101, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 16:02:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-05-21 16:02:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6003. [2021-05-21 16:02:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 6002 states have (on average 2.8062312562479175) internal successors, (16843), 6002 states have internal predecessors, (16843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 16843 transitions. [2021-05-21 16:02:26,610 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 16843 transitions. Word has length 200 [2021-05-21 16:02:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:26,610 INFO L482 AbstractCegarLoop]: Abstraction has 6003 states and 16843 transitions. [2021-05-21 16:02:26,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 16843 transitions. [2021-05-21 16:02:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:26,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:26,614 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:26,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-05-21 16:02:26,815 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1385900706, now seen corresponding path program 580 times [2021-05-21 16:02:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:26,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144246129] [2021-05-21 16:02:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:27,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:27,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144246129] [2021-05-21 16:02:27,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144246129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:27,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133607934] [2021-05-21 16:02:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:27,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:02:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:27,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:27,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:27,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133607934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:27,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:27,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:27,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142651556] [2021-05-21 16:02:27,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:27,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:27,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:27,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:27,431 INFO L87 Difference]: Start difference. First operand 6003 states and 16843 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:28,905 INFO L93 Difference]: Finished difference Result 7771 states and 20582 transitions. [2021-05-21 16:02:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 16:02:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:28,911 INFO L225 Difference]: With dead ends: 7771 [2021-05-21 16:02:28,911 INFO L226 Difference]: Without dead ends: 7501 [2021-05-21 16:02:28,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 1454.7ms TimeCoverageRelationStatistics Valid=2588, Invalid=7714, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 16:02:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-05-21 16:02:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 6078. [2021-05-21 16:02:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6078 states, 6077 states have (on average 2.8086226756623334) internal successors, (17068), 6077 states have internal predecessors, (17068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 17068 transitions. [2021-05-21 16:02:28,973 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 17068 transitions. Word has length 200 [2021-05-21 16:02:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:28,973 INFO L482 AbstractCegarLoop]: Abstraction has 6078 states and 17068 transitions. [2021-05-21 16:02:28,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 17068 transitions. [2021-05-21 16:02:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:28,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:28,977 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:29,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:29,178 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1009050384, now seen corresponding path program 581 times [2021-05-21 16:02:29,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:29,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020197680] [2021-05-21 16:02:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:29,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020197680] [2021-05-21 16:02:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020197680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754547474] [2021-05-21 16:02:29,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:29,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-21 16:02:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:29,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754547474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:29,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:29,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:29,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519667925] [2021-05-21 16:02:29,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:29,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:29,754 INFO L87 Difference]: Start difference. First operand 6078 states and 17068 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:30,949 INFO L93 Difference]: Finished difference Result 7796 states and 20707 transitions. [2021-05-21 16:02:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 16:02:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:30,956 INFO L225 Difference]: With dead ends: 7796 [2021-05-21 16:02:30,956 INFO L226 Difference]: Without dead ends: 7526 [2021-05-21 16:02:30,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=2572, Invalid=7328, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 16:02:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-05-21 16:02:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 6153. [2021-05-21 16:02:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 2.8109557867360206) internal successors, (17293), 6152 states have internal predecessors, (17293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 17293 transitions. [2021-05-21 16:02:31,019 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 17293 transitions. Word has length 200 [2021-05-21 16:02:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:31,019 INFO L482 AbstractCegarLoop]: Abstraction has 6153 states and 17293 transitions. [2021-05-21 16:02:31,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 17293 transitions. [2021-05-21 16:02:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:31,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:31,024 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:31,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-05-21 16:02:31,224 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1959161376, now seen corresponding path program 582 times [2021-05-21 16:02:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:31,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228837686] [2021-05-21 16:02:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:31,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:31,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228837686] [2021-05-21 16:02:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228837686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:31,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193609994] [2021-05-21 16:02:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:31,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 16:02:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:31,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193609994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:31,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:31,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181203557] [2021-05-21 16:02:31,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:31,831 INFO L87 Difference]: Start difference. First operand 6153 states and 17293 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:33,325 INFO L93 Difference]: Finished difference Result 7821 states and 20832 transitions. [2021-05-21 16:02:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 16:02:33,325 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:33,332 INFO L225 Difference]: With dead ends: 7821 [2021-05-21 16:02:33,333 INFO L226 Difference]: Without dead ends: 7551 [2021-05-21 16:02:33,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 1487.5ms TimeCoverageRelationStatistics Valid=2763, Invalid=7949, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 16:02:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-05-21 16:02:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 6228. [2021-05-21 16:02:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 2.8132326963224665) internal successors, (17518), 6227 states have internal predecessors, (17518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17518 transitions. [2021-05-21 16:02:33,397 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17518 transitions. Word has length 200 [2021-05-21 16:02:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:33,397 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17518 transitions. [2021-05-21 16:02:33,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17518 transitions. [2021-05-21 16:02:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:33,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:33,401 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:33,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:33,602 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1504945202, now seen corresponding path program 583 times [2021-05-21 16:02:33,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:33,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629014165] [2021-05-21 16:02:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:33,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:33,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629014165] [2021-05-21 16:02:33,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629014165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:33,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170472327] [2021-05-21 16:02:33,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:34,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170472327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:34,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:34,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:34,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900053904] [2021-05-21 16:02:34,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:34,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:34,174 INFO L87 Difference]: Start difference. First operand 6228 states and 17518 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:35,520 INFO L93 Difference]: Finished difference Result 7846 states and 20957 transitions. [2021-05-21 16:02:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 16:02:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:35,527 INFO L225 Difference]: With dead ends: 7846 [2021-05-21 16:02:35,527 INFO L226 Difference]: Without dead ends: 7576 [2021-05-21 16:02:35,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 1290.0ms TimeCoverageRelationStatistics Valid=2755, Invalid=7547, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 16:02:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-05-21 16:02:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6303. [2021-05-21 16:02:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6302 states have (on average 2.815455410980641) internal successors, (17743), 6302 states have internal predecessors, (17743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 17743 transitions. [2021-05-21 16:02:35,593 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 17743 transitions. Word has length 200 [2021-05-21 16:02:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:35,593 INFO L482 AbstractCegarLoop]: Abstraction has 6303 states and 17743 transitions. [2021-05-21 16:02:35,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 17743 transitions. [2021-05-21 16:02:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:35,597 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:35,597 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:35,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:35,798 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:35,798 INFO L82 PathProgramCache]: Analyzing trace with hash -506048866, now seen corresponding path program 584 times [2021-05-21 16:02:35,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:35,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33701421] [2021-05-21 16:02:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:36,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33701421] [2021-05-21 16:02:36,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33701421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845794135] [2021-05-21 16:02:36,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:36,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 16:02:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:36,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:36,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845794135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:36,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:36,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:36,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698437371] [2021-05-21 16:02:36,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:36,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:36,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:36,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:36,404 INFO L87 Difference]: Start difference. First operand 6303 states and 17743 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:38,049 INFO L93 Difference]: Finished difference Result 7871 states and 21082 transitions. [2021-05-21 16:02:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 16:02:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:38,056 INFO L225 Difference]: With dead ends: 7871 [2021-05-21 16:02:38,056 INFO L226 Difference]: Without dead ends: 7601 [2021-05-21 16:02:38,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 1638.5ms TimeCoverageRelationStatistics Valid=2954, Invalid=8176, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 16:02:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-05-21 16:02:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 6378. [2021-05-21 16:02:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6377 states have (on average 2.817625842872824) internal successors, (17968), 6377 states have internal predecessors, (17968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 17968 transitions. [2021-05-21 16:02:38,123 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 17968 transitions. Word has length 200 [2021-05-21 16:02:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:38,123 INFO L482 AbstractCegarLoop]: Abstraction has 6378 states and 17968 transitions. [2021-05-21 16:02:38,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 17968 transitions. [2021-05-21 16:02:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:38,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:38,127 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:38,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:38,328 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:38,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1909590540, now seen corresponding path program 585 times [2021-05-21 16:02:38,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:38,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530982913] [2021-05-21 16:02:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:38,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:38,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530982913] [2021-05-21 16:02:38,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530982913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:38,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412660991] [2021-05-21 16:02:38,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:38,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-21 16:02:38,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:38,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:38,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412660991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:38,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:38,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:38,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124457105] [2021-05-21 16:02:38,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:38,921 INFO L87 Difference]: Start difference. First operand 6378 states and 17968 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:40,324 INFO L93 Difference]: Finished difference Result 7896 states and 21207 transitions. [2021-05-21 16:02:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 16:02:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:40,331 INFO L225 Difference]: With dead ends: 7896 [2021-05-21 16:02:40,331 INFO L226 Difference]: Without dead ends: 7626 [2021-05-21 16:02:40,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 1374.4ms TimeCoverageRelationStatistics Valid=2954, Invalid=7758, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 16:02:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-05-21 16:02:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6453. [2021-05-21 16:02:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 2.819745815251085) internal successors, (18193), 6452 states have internal predecessors, (18193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18193 transitions. [2021-05-21 16:02:40,398 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18193 transitions. Word has length 200 [2021-05-21 16:02:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:40,398 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18193 transitions. [2021-05-21 16:02:40,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18193 transitions. [2021-05-21 16:02:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:40,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:40,402 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:40,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:40,603 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash -355057444, now seen corresponding path program 586 times [2021-05-21 16:02:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:40,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612913959] [2021-05-21 16:02:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:40,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612913959] [2021-05-21 16:02:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612913959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211380362] [2021-05-21 16:02:40,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:41,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 16:02:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211380362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233299720] [2021-05-21 16:02:41,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:41,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:41,196 INFO L87 Difference]: Start difference. First operand 6453 states and 18193 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:42,819 INFO L93 Difference]: Finished difference Result 7921 states and 21332 transitions. [2021-05-21 16:02:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 16:02:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:42,827 INFO L225 Difference]: With dead ends: 7921 [2021-05-21 16:02:42,827 INFO L226 Difference]: Without dead ends: 7651 [2021-05-21 16:02:42,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 1597.8ms TimeCoverageRelationStatistics Valid=3161, Invalid=8395, Unknown=0, NotChecked=0, Total=11556 [2021-05-21 16:02:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-05-21 16:02:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 6528. [2021-05-21 16:02:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6528 states, 6527 states have (on average 2.821817067565497) internal successors, (18418), 6527 states have internal predecessors, (18418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6528 states to 6528 states and 18418 transitions. [2021-05-21 16:02:42,895 INFO L78 Accepts]: Start accepts. Automaton has 6528 states and 18418 transitions. Word has length 200 [2021-05-21 16:02:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:42,895 INFO L482 AbstractCegarLoop]: Abstraction has 6528 states and 18418 transitions. [2021-05-21 16:02:42,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6528 states and 18418 transitions. [2021-05-21 16:02:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:42,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:42,901 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:43,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-05-21 16:02:43,101 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:43,102 INFO L82 PathProgramCache]: Analyzing trace with hash 259182026, now seen corresponding path program 587 times [2021-05-21 16:02:43,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:43,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646216582] [2021-05-21 16:02:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:43,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646216582] [2021-05-21 16:02:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646216582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486634083] [2021-05-21 16:02:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:43,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-21 16:02:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:43,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:43,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:43,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486634083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:43,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:43,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:43,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612455820] [2021-05-21 16:02:43,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:43,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:43,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:43,686 INFO L87 Difference]: Start difference. First operand 6528 states and 18418 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:45,022 INFO L93 Difference]: Finished difference Result 7991 states and 21577 transitions. [2021-05-21 16:02:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 16:02:45,022 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:45,029 INFO L225 Difference]: With dead ends: 7991 [2021-05-21 16:02:45,029 INFO L226 Difference]: Without dead ends: 7721 [2021-05-21 16:02:45,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 1327.9ms TimeCoverageRelationStatistics Valid=3169, Invalid=7961, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 16:02:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7721 states. [2021-05-21 16:02:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7721 to 6603. [2021-05-21 16:02:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6602 states have (on average 2.826113299000303) internal successors, (18658), 6602 states have internal predecessors, (18658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 18658 transitions. [2021-05-21 16:02:45,098 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 18658 transitions. Word has length 200 [2021-05-21 16:02:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:45,098 INFO L482 AbstractCegarLoop]: Abstraction has 6603 states and 18658 transitions. [2021-05-21 16:02:45,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 18658 transitions. [2021-05-21 16:02:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:45,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:45,104 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:45,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-05-21 16:02:45,304 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1456060262, now seen corresponding path program 588 times [2021-05-21 16:02:45,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:45,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250491316] [2021-05-21 16:02:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:45,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:45,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250491316] [2021-05-21 16:02:45,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250491316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:45,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478775675] [2021-05-21 16:02:45,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:45,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-05-21 16:02:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 16:02:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:45,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478775675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:45,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:45,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-05-21 16:02:45,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209118552] [2021-05-21 16:02:45,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 16:02:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 16:02:45,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 16:02:45,912 INFO L87 Difference]: Start difference. First operand 6603 states and 18658 transitions. Second operand has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 16:02:47,645 INFO L93 Difference]: Finished difference Result 8569 states and 23203 transitions. [2021-05-21 16:02:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-21 16:02:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-05-21 16:02:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 16:02:47,653 INFO L225 Difference]: With dead ends: 8569 [2021-05-21 16:02:47,653 INFO L226 Difference]: Without dead ends: 7946 [2021-05-21 16:02:47,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 1681.7ms TimeCoverageRelationStatistics Valid=3405, Invalid=9027, Unknown=0, NotChecked=0, Total=12432 [2021-05-21 16:02:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2021-05-21 16:02:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 6678. [2021-05-21 16:02:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6677 states have (on average 2.8288153362288453) internal successors, (18888), 6677 states have internal predecessors, (18888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 18888 transitions. [2021-05-21 16:02:47,722 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 18888 transitions. Word has length 200 [2021-05-21 16:02:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 16:02:47,723 INFO L482 AbstractCegarLoop]: Abstraction has 6678 states and 18888 transitions. [2021-05-21 16:02:47,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 5.05) internal successors, (202), 40 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 16:02:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 18888 transitions. [2021-05-21 16:02:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-21 16:02:47,728 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 16:02:47,729 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 16:02:47,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-05-21 16:02:47,944 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 16:02:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 16:02:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1806259432, now seen corresponding path program 589 times [2021-05-21 16:02:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 16:02:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617146076] [2021-05-21 16:02:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 16:02:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 16:02:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617146076] [2021-05-21 16:02:48,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617146076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:48,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496435658] [2021-05-21 16:02:48,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 16:02:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 16:02:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-21 16:02:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 16:02:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 16:02:48,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496435658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 16:02:48,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 16:02:48,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-05-21 16:02:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809526642] [2021-05-21 16:02:48,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 16:02:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 16:02:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 16:02:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 16:02:48,549 INFO L87 Difference]: Start difference. First operand 6678 states and 18888 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 39 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-21 16:02:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 16:02:50,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-21 16:02:50,053 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 16:02:50,054 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 16:02:50,055 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 16:02:50,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 04:02:50 BasicIcfg [2021-05-21 16:02:50,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 16:02:50,056 INFO L168 Benchmark]: Toolchain (without parser) took 834523.67 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 950.0 MB). Free memory was 316.9 MB in the beginning and 1.0 GB in the end (delta: -711.2 MB). Peak memory consumption was 239.5 MB. Max. memory is 16.0 GB. [2021-05-21 16:02:50,056 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory is still 335.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 16:02:50,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.14 ms. Allocated memory is still 354.4 MB. Free memory was 316.7 MB in the beginning and 318.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.0 GB. [2021-05-21 16:02:50,056 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.03 ms. Allocated memory is still 354.4 MB. Free memory was 318.2 MB in the beginning and 316.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 16:02:50,056 INFO L168 Benchmark]: Boogie Preprocessor took 27.75 ms. Allocated memory is still 354.4 MB. Free memory was 316.1 MB in the beginning and 315.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 16:02:50,056 INFO L168 Benchmark]: RCFGBuilder took 325.21 ms. Allocated memory is still 354.4 MB. Free memory was 315.0 MB in the beginning and 292.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 16:02:50,057 INFO L168 Benchmark]: TraceAbstraction took 833715.41 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 950.0 MB). Free memory was 290.9 MB in the beginning and 1.0 GB in the end (delta: -737.1 MB). Peak memory consumption was 215.5 MB. Max. memory is 16.0 GB. [2021-05-21 16:02:50,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory is still 335.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 408.14 ms. Allocated memory is still 354.4 MB. Free memory was 316.7 MB in the beginning and 318.2 MB in the end (delta: -1.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 43.03 ms. Allocated memory is still 354.4 MB. Free memory was 318.2 MB in the beginning and 316.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.75 ms. Allocated memory is still 354.4 MB. Free memory was 316.1 MB in the beginning and 315.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 325.21 ms. Allocated memory is still 354.4 MB. Free memory was 315.0 MB in the beginning and 292.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 833715.41 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 950.0 MB). Free memory was 290.9 MB in the beginning and 1.0 GB in the end (delta: -737.1 MB). Peak memory consumption was 215.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (6678states) and FLOYD_HOARE automaton (currently 70 states, 39 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 833640.8ms, OverallIterations: 598, TraceHistogramMax: 17, EmptinessCheckTime: 1837.2ms, AutomataDifference: 423791.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57939 SDtfs, 772225 SDslu, 657469 SDs, 0 SdLazy, 121194 SolverSat, 135851 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66587.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125132 GetRequests, 86151 SyntacticMatches, 0 SemanticMatches, 38980 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703653 ImplicationChecksByTransitivity, 427851.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6678occurred in iteration=597, InterpolantAutomatonStates: 27033, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26714.3ms AutomataMinimizationTime, 597 MinimizatonAttempts, 764127 StatesRemovedByMinimization, 597 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5872.7ms SsaConstructionTime, 18542.8ms SatisfiabilityAnalysisTime, 220284.8ms InterpolantComputationTime, 172398 NumberOfCodeBlocks, 172398 NumberOfCodeBlocksAsserted, 4733 NumberOfCheckSat, 171208 ConstructedInterpolants, 0 QuantifiedInterpolants, 754016 SizeOfPredicates, 14273 NumberOfNonLiveVariables, 166152 ConjunctsInSsa, 17234 ConjunctsInUnsatCore, 1190 InterpolantComputations, 6 PerfectInterpolantSequences, 1/741124 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown